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Finding the Fourth Proportional to 955.52, 1,318.86 and 624.86

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Solution

The fourth proportional to 955.52, 1,318.86 and 624.86 is: 862.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.52 : 1,318.86 = 624.86 : x
  2. Step 2: Convert to fraction form
    955.52/1,318.86 = 624.86/x
  3. Step 3: Cross multiply
    955.52x = 1,318.86 × 624.86
  4. Step 4: Simplify right side
    955.52x = 824,102.86
  5. Step 5: Solve for x
    x = 824,102.86/955.52
  6. Step 6: Final answer
    x = 862.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.