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Finding the Fourth Proportional to 1,513.91, 2,090.03 and 916.52

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Solution

The fourth proportional to 1,513.91, 2,090.03 and 916.52 is: 1,265.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,513.91 : 2,090.03 = 916.52 : x
  2. Step 2: Convert to fraction form
    1,513.91/2,090.03 = 916.52/x
  3. Step 3: Cross multiply
    1,513.91x = 2,090.03 × 916.52
  4. Step 4: Simplify right side
    1,513.91x = 1,915,539.26
  5. Step 5: Solve for x
    x = 1,915,539.26/1,513.91
  6. Step 6: Final answer
    x = 1,265.29

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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.