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Finding the Fourth Proportional to 955.29, 1,318.14 and 624.27

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Solution

The fourth proportional to 955.29, 1,318.14 and 624.27 is: 861.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.29 : 1,318.14 = 624.27 : x
  2. Step 2: Convert to fraction form
    955.29/1,318.14 = 624.27/x
  3. Step 3: Cross multiply
    955.29x = 1,318.14 × 624.27
  4. Step 4: Simplify right side
    955.29x = 822,875.26
  5. Step 5: Solve for x
    x = 822,875.26/955.29
  6. Step 6: Final answer
    x = 861.39

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1.5x scale

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.