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Finding the Fourth Proportional to 956.17, 1,319.75 and 624.03

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Solution

The fourth proportional to 956.17, 1,319.75 and 624.03 is: 861.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.17 : 1,319.75 = 624.03 : x
  2. Step 2: Convert to fraction form
    956.17/1,319.75 = 624.03/x
  3. Step 3: Cross multiply
    956.17x = 1,319.75 × 624.03
  4. Step 4: Simplify right side
    956.17x = 823,563.59
  5. Step 5: Solve for x
    x = 823,563.59/956.17
  6. Step 6: Final answer
    x = 861.32

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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.