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Finding the Fourth Proportional to 932.64, 1,286.40 and 559.32

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Solution

The fourth proportional to 932.64, 1,286.40 and 559.32 is: 771.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.64 : 1,286.40 = 559.32 : x
  2. Step 2: Convert to fraction form
    932.64/1,286.40 = 559.32/x
  3. Step 3: Cross multiply
    932.64x = 1,286.40 × 559.32
  4. Step 4: Simplify right side
    932.64x = 719,509.25
  5. Step 5: Solve for x
    x = 719,509.25/932.64
  6. Step 6: Final answer
    x = 771.48

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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.