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Finding the Fourth Proportional to 3,438.52, 5,157 and 972.68

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Solution

The fourth proportional to 3,438.52, 5,157 and 972.68 is: 1,458.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,438.52 : 5,157 = 972.68 : x
  2. Step 2: Convert to fraction form
    3,438.52/5,157 = 972.68/x
  3. Step 3: Cross multiply
    3,438.52x = 5,157 × 972.68
  4. Step 4: Simplify right side
    3,438.52x = 5,016,084.98
  5. Step 5: Solve for x
    x = 5,016,084.98/3,438.52
  6. Step 6: Final answer
    x = 1,458.79

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1.5x scale

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.