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Finding the Fourth Proportional to 972, 1,455.98 and 871.16

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Solution

The fourth proportional to 972, 1,455.98 and 871.16 is: 1,304.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    972 : 1,455.98 = 871.16 : x
  2. Step 2: Convert to fraction form
    972/1,455.98 = 871.16/x
  3. Step 3: Cross multiply
    972x = 1,455.98 × 871.16
  4. Step 4: Simplify right side
    972x = 1,268,379.90
  5. Step 5: Solve for x
    x = 1,268,379.90/972
  6. Step 6: Final answer
    x = 1,304.92

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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.