Home / 1,132.11-1,562.14-690.15

Finding the Fourth Proportional to 1,132.11, 1,562.14 and 690.15

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Solution

The fourth proportional to 1,132.11, 1,562.14 and 690.15 is: 952.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,132.11 : 1,562.14 = 690.15 : x
  2. Step 2: Convert to fraction form
    1,132.11/1,562.14 = 690.15/x
  3. Step 3: Cross multiply
    1,132.11x = 1,562.14 × 690.15
  4. Step 4: Simplify right side
    1,132.11x = 1,078,113.76
  5. Step 5: Solve for x
    x = 1,078,113.76/1,132.11
  6. Step 6: Final answer
    x = 952.30

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Half scale
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Double scale
Find fourth proportional to 1,133.11, 1,563.52 and 691.15
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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.