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Finding the Fourth Proportional to 638,700.72, 958,068.32 and 158,909.12

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Solution

The fourth proportional to 638,700.72, 958,068.32 and 158,909.12 is: 238,367.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,700.72 : 958,068.32 = 158,909.12 : x
  2. Step 2: Convert to fraction form
    638,700.72/958,068.32 = 158,909.12/x
  3. Step 3: Cross multiply
    638,700.72x = 958,068.32 × 158,909.12
  4. Step 4: Simplify right side
    638,700.72x = 152,245,793,631.08
  5. Step 5: Solve for x
    x = 152,245,793,631.08/638,700.72
  6. Step 6: Final answer
    x = 238,367.97

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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.