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Finding the Fourth Proportional to 387,722.72, 581,677.02 and 187,809.45

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Solution

The fourth proportional to 387,722.72, 581,677.02 and 187,809.45 is: 281,759.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,722.72 : 581,677.02 = 187,809.45 : x
  2. Step 2: Convert to fraction form
    387,722.72/581,677.02 = 187,809.45/x
  3. Step 3: Cross multiply
    387,722.72x = 581,677.02 × 187,809.45
  4. Step 4: Simplify right side
    387,722.72x = 109,244,441,203.84
  5. Step 5: Solve for x
    x = 109,244,441,203.84/387,722.72
  6. Step 6: Final answer
    x = 281,759.20

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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.