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Finding the Fourth Proportional to 643,946.80, 966,049.80 and 539,489.20

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Solution

The fourth proportional to 643,946.80, 966,049.80 and 539,489.20 is: 809,342.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,946.80 : 966,049.80 = 539,489.20 : x
  2. Step 2: Convert to fraction form
    643,946.80/966,049.80 = 539,489.20/x
  3. Step 3: Cross multiply
    643,946.80x = 966,049.80 × 539,489.20
  4. Step 4: Simplify right side
    643,946.80x = 521,173,433,762.16
  5. Step 5: Solve for x
    x = 521,173,433,762.16/643,946.80
  6. Step 6: Final answer
    x = 809,342.38

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Double scale
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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.