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Finding the Fourth Proportional to 407,098.76, 610,703.58 and 140,787.80

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Solution

The fourth proportional to 407,098.76, 610,703.58 and 140,787.80 is: 211,200.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,098.76 : 610,703.58 = 140,787.80 : x
  2. Step 2: Convert to fraction form
    407,098.76/610,703.58 = 140,787.80/x
  3. Step 3: Cross multiply
    407,098.76x = 610,703.58 × 140,787.80
  4. Step 4: Simplify right side
    407,098.76x = 85,979,613,480.32
  5. Step 5: Solve for x
    x = 85,979,613,480.32/407,098.76
  6. Step 6: Final answer
    x = 211,200.87

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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.