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Finding the Fourth Proportional to 387,558.14, 581,299.61 and 117,688.61

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Solution

The fourth proportional to 387,558.14, 581,299.61 and 117,688.61 is: 176,521.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,558.14 : 581,299.61 = 117,688.61 : x
  2. Step 2: Convert to fraction form
    387,558.14/581,299.61 = 117,688.61/x
  3. Step 3: Cross multiply
    387,558.14x = 581,299.61 × 117,688.61
  4. Step 4: Simplify right side
    387,558.14x = 68,412,342,499.89
  5. Step 5: Solve for x
    x = 68,412,342,499.89/387,558.14
  6. Step 6: Final answer
    x = 176,521.49

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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.