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Finding the Fourth Proportional to 387,489.45, 581,245.08 and 107,006.70

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Solution

The fourth proportional to 387,489.45, 581,245.08 and 107,006.70 is: 160,513.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,489.45 : 581,245.08 = 107,006.70 : x
  2. Step 2: Convert to fraction form
    387,489.45/581,245.08 = 107,006.70/x
  3. Step 3: Cross multiply
    387,489.45x = 581,245.08 × 107,006.70
  4. Step 4: Simplify right side
    387,489.45x = 62,197,117,902.04
  5. Step 5: Solve for x
    x = 62,197,117,902.04/387,489.45
  6. Step 6: Final answer
    x = 160,513.06

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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.