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Finding the Fourth Proportional to 284,390.14, 392,455.99 and 157,063

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Solution

The fourth proportional to 284,390.14, 392,455.99 and 157,063 is: 216,745.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,390.14 : 392,455.99 = 157,063 : x
  2. Step 2: Convert to fraction form
    284,390.14/392,455.99 = 157,063/x
  3. Step 3: Cross multiply
    284,390.14x = 392,455.99 × 157,063
  4. Step 4: Simplify right side
    284,390.14x = 61,640,314,764.71
  5. Step 5: Solve for x
    x = 61,640,314,764.71/284,390.14
  6. Step 6: Final answer
    x = 216,745.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.