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Finding the Fourth Proportional to 387,809.77, 581,724.38 and 107,329.45

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Solution

The fourth proportional to 387,809.77, 581,724.38 and 107,329.45 is: 160,996.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,809.77 : 581,724.38 = 107,329.45 : x
  2. Step 2: Convert to fraction form
    387,809.77/581,724.38 = 107,329.45/x
  3. Step 3: Cross multiply
    387,809.77x = 581,724.38 × 107,329.45
  4. Step 4: Simplify right side
    387,809.77x = 62,436,157,756.99
  5. Step 5: Solve for x
    x = 62,436,157,756.99/387,809.77
  6. Step 6: Final answer
    x = 160,996.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.