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Finding the Fourth Proportional to 3,129.81, 4,691.42 and 1,484.38

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Solution

The fourth proportional to 3,129.81, 4,691.42 and 1,484.38 is: 2,225.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.81 : 4,691.42 = 1,484.38 : x
  2. Step 2: Convert to fraction form
    3,129.81/4,691.42 = 1,484.38/x
  3. Step 3: Cross multiply
    3,129.81x = 4,691.42 × 1,484.38
  4. Step 4: Simplify right side
    3,129.81x = 6,963,850.02
  5. Step 5: Solve for x
    x = 6,963,850.02/3,129.81
  6. Step 6: Final answer
    x = 2,225.01

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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.