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Finding the Fourth Proportional to 1,101.62, 1,518.54 and 681.19

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Solution

The fourth proportional to 1,101.62, 1,518.54 and 681.19 is: 938.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.62 : 1,518.54 = 681.19 : x
  2. Step 2: Convert to fraction form
    1,101.62/1,518.54 = 681.19/x
  3. Step 3: Cross multiply
    1,101.62x = 1,518.54 × 681.19
  4. Step 4: Simplify right side
    1,101.62x = 1,034,407.91
  5. Step 5: Solve for x
    x = 1,034,407.91/1,101.62
  6. Step 6: Final answer
    x = 938.99

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1.5x scale

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.