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Finding the Fourth Proportional to 709,943.04, 979,726.14 and 387,655.38

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Solution

The fourth proportional to 709,943.04, 979,726.14 and 387,655.38 is: 534,967.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,943.04 : 979,726.14 = 387,655.38 : x
  2. Step 2: Convert to fraction form
    709,943.04/979,726.14 = 387,655.38/x
  3. Step 3: Cross multiply
    709,943.04x = 979,726.14 × 387,655.38
  4. Step 4: Simplify right side
    709,943.04x = 379,796,109,097.63
  5. Step 5: Solve for x
    x = 379,796,109,097.63/709,943.04
  6. Step 6: Final answer
    x = 534,967.02

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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.