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Finding the Fourth Proportional to 387,988.09, 581,140.98 and 187,888.87

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Solution

The fourth proportional to 387,988.09, 581,140.98 and 187,888.87 is: 281,425.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,988.09 : 581,140.98 = 187,888.87 : x
  2. Step 2: Convert to fraction form
    387,988.09/581,140.98 = 187,888.87/x
  3. Step 3: Cross multiply
    387,988.09x = 581,140.98 × 187,888.87
  4. Step 4: Simplify right side
    387,988.09x = 109,189,922,769.32
  5. Step 5: Solve for x
    x = 109,189,922,769.32/387,988.09
  6. Step 6: Final answer
    x = 281,425.97

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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.