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Finding the Fourth Proportional to 643,805.20, 965,707.80 and 583,670.80

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Solution

The fourth proportional to 643,805.20, 965,707.80 and 583,670.80 is: 875,506.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,805.20 : 965,707.80 = 583,670.80 : x
  2. Step 2: Convert to fraction form
    643,805.20/965,707.80 = 583,670.80/x
  3. Step 3: Cross multiply
    643,805.20x = 965,707.80 × 583,670.80
  4. Step 4: Simplify right side
    643,805.20x = 563,655,444,192.24
  5. Step 5: Solve for x
    x = 563,655,444,192.24/643,805.20
  6. Step 6: Final answer
    x = 875,506.20

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.