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Finding the Fourth Proportional to 704.64, 1,055.76 and 338.92

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Solution

The fourth proportional to 704.64, 1,055.76 and 338.92 is: 507.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.64 : 1,055.76 = 338.92 : x
  2. Step 2: Convert to fraction form
    704.64/1,055.76 = 338.92/x
  3. Step 3: Cross multiply
    704.64x = 1,055.76 × 338.92
  4. Step 4: Simplify right side
    704.64x = 357,818.18
  5. Step 5: Solve for x
    x = 357,818.18/704.64
  6. Step 6: Final answer
    x = 507.80

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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.