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Finding the Fourth Proportional to 381,362.31, 572,015.67 and 156,661.71

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Solution

The fourth proportional to 381,362.31, 572,015.67 and 156,661.71 is: 234,981.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,362.31 : 572,015.67 = 156,661.71 : x
  2. Step 2: Convert to fraction form
    381,362.31/572,015.67 = 156,661.71/x
  3. Step 3: Cross multiply
    381,362.31x = 572,015.67 × 156,661.71
  4. Step 4: Simplify right side
    381,362.31x = 89,612,953,009.00
  5. Step 5: Solve for x
    x = 89,612,953,009.00/381,362.31
  6. Step 6: Final answer
    x = 234,981.15

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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.