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Finding the Fourth Proportional to 955.66, 1,318.88 and 624.98

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Solution

The fourth proportional to 955.66, 1,318.88 and 624.98 is: 862.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.66 : 1,318.88 = 624.98 : x
  2. Step 2: Convert to fraction form
    955.66/1,318.88 = 624.98/x
  3. Step 3: Cross multiply
    955.66x = 1,318.88 × 624.98
  4. Step 4: Simplify right side
    955.66x = 824,273.62
  5. Step 5: Solve for x
    x = 824,273.62/955.66
  6. Step 6: Final answer
    x = 862.52

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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.