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Finding the Fourth Proportional to 1,242.02, 1,862.94 and 317.54

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Solution

The fourth proportional to 1,242.02, 1,862.94 and 317.54 is: 476.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.02 : 1,862.94 = 317.54 : x
  2. Step 2: Convert to fraction form
    1,242.02/1,862.94 = 317.54/x
  3. Step 3: Cross multiply
    1,242.02x = 1,862.94 × 317.54
  4. Step 4: Simplify right side
    1,242.02x = 591,557.97
  5. Step 5: Solve for x
    x = 591,557.97/1,242.02
  6. Step 6: Final answer
    x = 476.29

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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.