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Finding the Fourth Proportional to 565,130.76, 779,995.04 and 347,240.20

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Solution

The fourth proportional to 565,130.76, 779,995.04 and 347,240.20 is: 479,261.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,130.76 : 779,995.04 = 347,240.20 : x
  2. Step 2: Convert to fraction form
    565,130.76/779,995.04 = 347,240.20/x
  3. Step 3: Cross multiply
    565,130.76x = 779,995.04 × 347,240.20
  4. Step 4: Simplify right side
    565,130.76x = 270,845,633,688.61
  5. Step 5: Solve for x
    x = 270,845,633,688.61/565,130.76
  6. Step 6: Final answer
    x = 479,261.89

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Half scale
Find fourth proportional to 1,130,261.52, 1,559,990.08 and 694,480.40
Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.