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Finding the Fourth Proportional to 709,363.68, 978,945.52 and 387,091.46

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Solution

The fourth proportional to 709,363.68, 978,945.52 and 387,091.46 is: 534,199.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,363.68 : 978,945.52 = 387,091.46 : x
  2. Step 2: Convert to fraction form
    709,363.68/978,945.52 = 387,091.46/x
  3. Step 3: Cross multiply
    709,363.68x = 978,945.52 × 387,091.46
  4. Step 4: Simplify right side
    709,363.68x = 378,941,453,044.62
  5. Step 5: Solve for x
    x = 378,941,453,044.62/709,363.68
  6. Step 6: Final answer
    x = 534,199.12

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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.