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Finding the Fourth Proportional to 709,476.19, 979,097.90 and 387,206.96

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Solution

The fourth proportional to 709,476.19, 979,097.90 and 387,206.96 is: 534,356.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,476.19 : 979,097.90 = 387,206.96 : x
  2. Step 2: Convert to fraction form
    709,476.19/979,097.90 = 387,206.96/x
  3. Step 3: Cross multiply
    709,476.19x = 979,097.90 × 387,206.96
  4. Step 4: Simplify right side
    709,476.19x = 379,113,514,569.86
  5. Step 5: Solve for x
    x = 379,113,514,569.86/709,476.19
  6. Step 6: Final answer
    x = 534,356.93

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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.