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Finding the Fourth Proportional to 915.57, 1,263.43 and 566.19

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Solution

The fourth proportional to 915.57, 1,263.43 and 566.19 is: 781.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.57 : 1,263.43 = 566.19 : x
  2. Step 2: Convert to fraction form
    915.57/1,263.43 = 566.19/x
  3. Step 3: Cross multiply
    915.57x = 1,263.43 × 566.19
  4. Step 4: Simplify right side
    915.57x = 715,338.60
  5. Step 5: Solve for x
    x = 715,338.60/915.57
  6. Step 6: Final answer
    x = 781.30

Related Problems

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Half scale
Find fourth proportional to 1,831.14, 2,526.85 and 1,132.38
Double scale
Find fourth proportional to 916.57, 1,264.80 and 567.19
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.