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Finding the Fourth Proportional to 1,505.43, 2,077.71 and 916.14

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Solution

The fourth proportional to 1,505.43, 2,077.71 and 916.14 is: 1,264.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,505.43 : 2,077.71 = 916.14 : x
  2. Step 2: Convert to fraction form
    1,505.43/2,077.71 = 916.14/x
  3. Step 3: Cross multiply
    1,505.43x = 2,077.71 × 916.14
  4. Step 4: Simplify right side
    1,505.43x = 1,903,473.24
  5. Step 5: Solve for x
    x = 1,903,473.24/1,505.43
  6. Step 6: Final answer
    x = 1,264.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.