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Finding the Fourth Proportional to 709,363.93, 978,945.87 and 387,091.71

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Solution

The fourth proportional to 709,363.93, 978,945.87 and 387,091.71 is: 534,199.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,363.93 : 978,945.87 = 387,091.71 : x
  2. Step 2: Convert to fraction form
    709,363.93/978,945.87 = 387,091.71/x
  3. Step 3: Cross multiply
    709,363.93x = 978,945.87 × 387,091.71
  4. Step 4: Simplify right side
    709,363.93x = 378,941,828,880.28
  5. Step 5: Solve for x
    x = 378,941,828,880.28/709,363.93
  6. Step 6: Final answer
    x = 534,199.46

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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.