Home / 709,914.10-979,721.13-387,654.10

Finding the Fourth Proportional to 709,914.10, 979,721.13 and 387,654.10

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Solution

The fourth proportional to 709,914.10, 979,721.13 and 387,654.10 is: 534,984.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,914.10 : 979,721.13 = 387,654.10 : x
  2. Step 2: Convert to fraction form
    709,914.10/979,721.13 = 387,654.10/x
  3. Step 3: Cross multiply
    709,914.10x = 979,721.13 × 387,654.10
  4. Step 4: Simplify right side
    709,914.10x = 379,792,912,901.13
  5. Step 5: Solve for x
    x = 379,792,912,901.13/709,914.10
  6. Step 6: Final answer
    x = 534,984.32

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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.