Home / 651,330.60-976,995.90-438,754.20

Finding the Fourth Proportional to 651,330.60, 976,995.90 and 438,754.20

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Solution

The fourth proportional to 651,330.60, 976,995.90 and 438,754.20 is: 658,131.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,330.60 : 976,995.90 = 438,754.20 : x
  2. Step 2: Convert to fraction form
    651,330.60/976,995.90 = 438,754.20/x
  3. Step 3: Cross multiply
    651,330.60x = 976,995.90 × 438,754.20
  4. Step 4: Simplify right side
    651,330.60x = 428,661,054,507.78
  5. Step 5: Solve for x
    x = 428,661,054,507.78/651,330.60
  6. Step 6: Final answer
    x = 658,131.30

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Half scale
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Double scale
Find fourth proportional to 651,331.60, 976,997.40 and 438,755.20
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.