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Finding the Fourth Proportional to 703.52, 1,052.80 and 429.44

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Solution

The fourth proportional to 703.52, 1,052.80 and 429.44 is: 642.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.52 : 1,052.80 = 429.44 : x
  2. Step 2: Convert to fraction form
    703.52/1,052.80 = 429.44/x
  3. Step 3: Cross multiply
    703.52x = 1,052.80 × 429.44
  4. Step 4: Simplify right side
    703.52x = 452,114.43
  5. Step 5: Solve for x
    x = 452,114.43/703.52
  6. Step 6: Final answer
    x = 642.65

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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.