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Finding the Fourth Proportional to 956.31, 1,319.97 and 558.32

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Solution

The fourth proportional to 956.31, 1,319.97 and 558.32 is: 770.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.31 : 1,319.97 = 558.32 : x
  2. Step 2: Convert to fraction form
    956.31/1,319.97 = 558.32/x
  3. Step 3: Cross multiply
    956.31x = 1,319.97 × 558.32
  4. Step 4: Simplify right side
    956.31x = 736,959.05
  5. Step 5: Solve for x
    x = 736,959.05/956.31
  6. Step 6: Final answer
    x = 770.63

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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.