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Finding the Fourth Proportional to 386,881.76, 580,349.30 and 162,015.79

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Solution

The fourth proportional to 386,881.76, 580,349.30 and 162,015.79 is: 243,034.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,881.76 : 580,349.30 = 162,015.79 : x
  2. Step 2: Convert to fraction form
    386,881.76/580,349.30 = 162,015.79/x
  3. Step 3: Cross multiply
    386,881.76x = 580,349.30 × 162,015.79
  4. Step 4: Simplify right side
    386,881.76x = 94,025,748,877.43
  5. Step 5: Solve for x
    x = 94,025,748,877.43/386,881.76
  6. Step 6: Final answer
    x = 243,034.85

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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.