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Finding the Fourth Proportional to 3,116.81, 4,674.31 and 925.02

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Solution

The fourth proportional to 3,116.81, 4,674.31 and 925.02 is: 1,387.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,116.81 : 4,674.31 = 925.02 : x
  2. Step 2: Convert to fraction form
    3,116.81/4,674.31 = 925.02/x
  3. Step 3: Cross multiply
    3,116.81x = 4,674.31 × 925.02
  4. Step 4: Simplify right side
    3,116.81x = 4,323,827.92
  5. Step 5: Solve for x
    x = 4,323,827.92/3,116.81
  6. Step 6: Final answer
    x = 1,387.26

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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.