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Finding the Fourth Proportional to 1,411.38, 2,114.38 and 972.87

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Solution

The fourth proportional to 1,411.38, 2,114.38 and 972.87 is: 1,457.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,411.38 : 2,114.38 = 972.87 : x
  2. Step 2: Convert to fraction form
    1,411.38/2,114.38 = 972.87/x
  3. Step 3: Cross multiply
    1,411.38x = 2,114.38 × 972.87
  4. Step 4: Simplify right side
    1,411.38x = 2,057,028.44
  5. Step 5: Solve for x
    x = 2,057,028.44/1,411.38
  6. Step 6: Final answer
    x = 1,457.45

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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.