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Finding the Fourth Proportional to 280,640.66, 387,241.40 and 159,787.04

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Solution

The fourth proportional to 280,640.66, 387,241.40 and 159,787.04 is: 220,481.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,640.66 : 387,241.40 = 159,787.04 : x
  2. Step 2: Convert to fraction form
    280,640.66/387,241.40 = 159,787.04/x
  3. Step 3: Cross multiply
    280,640.66x = 387,241.40 × 159,787.04
  4. Step 4: Simplify right side
    280,640.66x = 61,876,157,071.46
  5. Step 5: Solve for x
    x = 61,876,157,071.46/280,640.66
  6. Step 6: Final answer
    x = 220,481.80

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1.5x scale

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.