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Finding the Fourth Proportional to 1,132.75, 1,563.29 and 667.09

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Solution

The fourth proportional to 1,132.75, 1,563.29 and 667.09 is: 920.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,132.75 : 1,563.29 = 667.09 : x
  2. Step 2: Convert to fraction form
    1,132.75/1,563.29 = 667.09/x
  3. Step 3: Cross multiply
    1,132.75x = 1,563.29 × 667.09
  4. Step 4: Simplify right side
    1,132.75x = 1,042,855.13
  5. Step 5: Solve for x
    x = 1,042,855.13/1,132.75
  6. Step 6: Final answer
    x = 920.64

Related Problems

Find fourth proportional to 566.38, 781.65 and 333.55
Half scale
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Double scale
Find fourth proportional to 1,133.75, 1,564.67 and 668.09
Similar ratio
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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.