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Finding the Fourth Proportional to 955.92, 1,319.76 and 607.20

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Solution

The fourth proportional to 955.92, 1,319.76 and 607.20 is: 838.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.92 : 1,319.76 = 607.20 : x
  2. Step 2: Convert to fraction form
    955.92/1,319.76 = 607.20/x
  3. Step 3: Cross multiply
    955.92x = 1,319.76 × 607.20
  4. Step 4: Simplify right side
    955.92x = 801,358.27
  5. Step 5: Solve for x
    x = 801,358.27/955.92
  6. Step 6: Final answer
    x = 838.31

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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.