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Finding the Fourth Proportional to 2,461.95, 3,691.53 and 817.58

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Solution

The fourth proportional to 2,461.95, 3,691.53 and 817.58 is: 1,225.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,461.95 : 3,691.53 = 817.58 : x
  2. Step 2: Convert to fraction form
    2,461.95/3,691.53 = 817.58/x
  3. Step 3: Cross multiply
    2,461.95x = 3,691.53 × 817.58
  4. Step 4: Simplify right side
    2,461.95x = 3,018,130.33
  5. Step 5: Solve for x
    x = 3,018,130.33/2,461.95
  6. Step 6: Final answer
    x = 1,225.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.