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Finding the Fourth Proportional to 837.41, 1,248.50 and 815.76

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Solution

The fourth proportional to 837.41, 1,248.50 and 815.76 is: 1,216.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.41 : 1,248.50 = 815.76 : x
  2. Step 2: Convert to fraction form
    837.41/1,248.50 = 815.76/x
  3. Step 3: Cross multiply
    837.41x = 1,248.50 × 815.76
  4. Step 4: Simplify right side
    837.41x = 1,018,478.40
  5. Step 5: Solve for x
    x = 1,018,478.40/837.41
  6. Step 6: Final answer
    x = 1,216.23

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.