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Finding the Fourth Proportional to 915.06, 1,263.46 and 704.90

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Solution

The fourth proportional to 915.06, 1,263.46 and 704.90 is: 973.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.06 : 1,263.46 = 704.90 : x
  2. Step 2: Convert to fraction form
    915.06/1,263.46 = 704.90/x
  3. Step 3: Cross multiply
    915.06x = 1,263.46 × 704.90
  4. Step 4: Simplify right side
    915.06x = 890,612.95
  5. Step 5: Solve for x
    x = 890,612.95/915.06
  6. Step 6: Final answer
    x = 973.28

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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.