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Finding the Fourth Proportional to 640,876.16, 961,368.84 and 167,560.76

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Solution

The fourth proportional to 640,876.16, 961,368.84 and 167,560.76 is: 251,355.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,876.16 : 961,368.84 = 167,560.76 : x
  2. Step 2: Convert to fraction form
    640,876.16/961,368.84 = 167,560.76/x
  3. Step 3: Cross multiply
    640,876.16x = 961,368.84 × 167,560.76
  4. Step 4: Simplify right side
    640,876.16x = 161,087,693,470.72
  5. Step 5: Solve for x
    x = 161,087,693,470.72/640,876.16
  6. Step 6: Final answer
    x = 251,355.42

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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.