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Finding the Fourth Proportional to 280,372.91, 386,909.66 and 159,511.60

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Solution

The fourth proportional to 280,372.91, 386,909.66 and 159,511.60 is: 220,123.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,372.91 : 386,909.66 = 159,511.60 : x
  2. Step 2: Convert to fraction form
    280,372.91/386,909.66 = 159,511.60/x
  3. Step 3: Cross multiply
    280,372.91x = 386,909.66 × 159,511.60
  4. Step 4: Simplify right side
    280,372.91x = 61,716,578,587.44
  5. Step 5: Solve for x
    x = 61,716,578,587.44/280,372.91
  6. Step 6: Final answer
    x = 220,123.19

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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.