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Finding the Fourth Proportional to 932.88, 1,397.36 and 607.28

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Solution

The fourth proportional to 932.88, 1,397.36 and 607.28 is: 909.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.88 : 1,397.36 = 607.28 : x
  2. Step 2: Convert to fraction form
    932.88/1,397.36 = 607.28/x
  3. Step 3: Cross multiply
    932.88x = 1,397.36 × 607.28
  4. Step 4: Simplify right side
    932.88x = 848,588.78
  5. Step 5: Solve for x
    x = 848,588.78/932.88
  6. Step 6: Final answer
    x = 909.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.