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Finding the Fourth Proportional to 1,132.76, 1,563.11 and 690.57

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Solution

The fourth proportional to 1,132.76, 1,563.11 and 690.57 is: 952.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,132.76 : 1,563.11 = 690.57 : x
  2. Step 2: Convert to fraction form
    1,132.76/1,563.11 = 690.57/x
  3. Step 3: Cross multiply
    1,132.76x = 1,563.11 × 690.57
  4. Step 4: Simplify right side
    1,132.76x = 1,079,433.42
  5. Step 5: Solve for x
    x = 1,079,433.42/1,132.76
  6. Step 6: Final answer
    x = 952.93

Related Problems

Find fourth proportional to 566.38, 781.55 and 345.29
Half scale
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Double scale
Find fourth proportional to 1,133.76, 1,564.48 and 691.57
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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.