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Finding the Fourth Proportional to 710,715.20, 1,066,072.80 and 652,654.40

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Solution

The fourth proportional to 710,715.20, 1,066,072.80 and 652,654.40 is: 978,981.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,715.20 : 1,066,072.80 = 652,654.40 : x
  2. Step 2: Convert to fraction form
    710,715.20/1,066,072.80 = 652,654.40/x
  3. Step 3: Cross multiply
    710,715.20x = 1,066,072.80 × 652,654.40
  4. Step 4: Simplify right side
    710,715.20x = 695,777,103,640.32
  5. Step 5: Solve for x
    x = 695,777,103,640.32/710,715.20
  6. Step 6: Final answer
    x = 978,981.60

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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.