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Finding the Fourth Proportional to 3,704.78, 5,557.02 and 931.47

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Solution

The fourth proportional to 3,704.78, 5,557.02 and 931.47 is: 1,397.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,704.78 : 5,557.02 = 931.47 : x
  2. Step 2: Convert to fraction form
    3,704.78/5,557.02 = 931.47/x
  3. Step 3: Cross multiply
    3,704.78x = 5,557.02 × 931.47
  4. Step 4: Simplify right side
    3,704.78x = 5,176,197.42
  5. Step 5: Solve for x
    x = 5,176,197.42/3,704.78
  6. Step 6: Final answer
    x = 1,397.17

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1.5x scale

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.