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Finding the Fourth Proportional to 4,750.56, 7,125.72 and 1,287.72

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Solution

The fourth proportional to 4,750.56, 7,125.72 and 1,287.72 is: 1,931.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,750.56 : 7,125.72 = 1,287.72 : x
  2. Step 2: Convert to fraction form
    4,750.56/7,125.72 = 1,287.72/x
  3. Step 3: Cross multiply
    4,750.56x = 7,125.72 × 1,287.72
  4. Step 4: Simplify right side
    4,750.56x = 9,175,932.16
  5. Step 5: Solve for x
    x = 9,175,932.16/4,750.56
  6. Step 6: Final answer
    x = 1,931.55

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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.