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Finding the Fourth Proportional to 956.27, 1,319.72 and 558.08

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Solution

The fourth proportional to 956.27, 1,319.72 and 558.08 is: 770.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.27 : 1,319.72 = 558.08 : x
  2. Step 2: Convert to fraction form
    956.27/1,319.72 = 558.08/x
  3. Step 3: Cross multiply
    956.27x = 1,319.72 × 558.08
  4. Step 4: Simplify right side
    956.27x = 736,506.55
  5. Step 5: Solve for x
    x = 736,506.55/956.27
  6. Step 6: Final answer
    x = 770.19

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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.