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Finding the Fourth Proportional to 704.24, 1,056.24 and 338.72

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Solution

The fourth proportional to 704.24, 1,056.24 and 338.72 is: 508.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.24 : 1,056.24 = 338.72 : x
  2. Step 2: Convert to fraction form
    704.24/1,056.24 = 338.72/x
  3. Step 3: Cross multiply
    704.24x = 1,056.24 × 338.72
  4. Step 4: Simplify right side
    704.24x = 357,769.61
  5. Step 5: Solve for x
    x = 357,769.61/704.24
  6. Step 6: Final answer
    x = 508.02

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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.