Home / 915.18-1,263.11-522.20

Finding the Fourth Proportional to 915.18, 1,263.11 and 522.20

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Solution

The fourth proportional to 915.18, 1,263.11 and 522.20 is: 720.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.18 : 1,263.11 = 522.20 : x
  2. Step 2: Convert to fraction form
    915.18/1,263.11 = 522.20/x
  3. Step 3: Cross multiply
    915.18x = 1,263.11 × 522.20
  4. Step 4: Simplify right side
    915.18x = 659,587.12
  5. Step 5: Solve for x
    x = 659,587.12/915.18
  6. Step 6: Final answer
    x = 720.72

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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.