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Finding the Fourth Proportional to 915.09, 1,262.50 and 635.25

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Solution

The fourth proportional to 915.09, 1,262.50 and 635.25 is: 876.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.09 : 1,262.50 = 635.25 : x
  2. Step 2: Convert to fraction form
    915.09/1,262.50 = 635.25/x
  3. Step 3: Cross multiply
    915.09x = 1,262.50 × 635.25
  4. Step 4: Simplify right side
    915.09x = 802,003.13
  5. Step 5: Solve for x
    x = 802,003.13/915.09
  6. Step 6: Final answer
    x = 876.42

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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.