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Finding the Fourth Proportional to 1,534, 2,116.92 and 913.12

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Solution

The fourth proportional to 1,534, 2,116.92 and 913.12 is: 1,260.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,534 : 2,116.92 = 913.12 : x
  2. Step 2: Convert to fraction form
    1,534/2,116.92 = 913.12/x
  3. Step 3: Cross multiply
    1,534x = 2,116.92 × 913.12
  4. Step 4: Simplify right side
    1,534x = 1,933,001.99
  5. Step 5: Solve for x
    x = 1,933,001.99/1,534
  6. Step 6: Final answer
    x = 1,260.11

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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.