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Finding the Fourth Proportional to 285,515.10, 428,294.52 and 75,150

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Solution

The fourth proportional to 285,515.10, 428,294.52 and 75,150 is: 112,730.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,515.10 : 428,294.52 = 75,150 : x
  2. Step 2: Convert to fraction form
    285,515.10/428,294.52 = 75,150/x
  3. Step 3: Cross multiply
    285,515.10x = 428,294.52 × 75,150
  4. Step 4: Simplify right side
    285,515.10x = 32,186,333,178
  5. Step 5: Solve for x
    x = 32,186,333,178/285,515.10
  6. Step 6: Final answer
    x = 112,730.76

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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.