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Finding the Fourth Proportional to 387,778.28, 581,674.71 and 121,532.90

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Solution

The fourth proportional to 387,778.28, 581,674.71 and 121,532.90 is: 182,301.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,778.28 : 581,674.71 = 121,532.90 : x
  2. Step 2: Convert to fraction form
    387,778.28/581,674.71 = 121,532.90/x
  3. Step 3: Cross multiply
    387,778.28x = 581,674.71 × 121,532.90
  4. Step 4: Simplify right side
    387,778.28x = 70,692,614,362.96
  5. Step 5: Solve for x
    x = 70,692,614,362.96/387,778.28
  6. Step 6: Final answer
    x = 182,301.63

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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.