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Finding the Fourth Proportional to 1,264.48, 1,893.72 and 613.12

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Solution

The fourth proportional to 1,264.48, 1,893.72 and 613.12 is: 918.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,264.48 : 1,893.72 = 613.12 : x
  2. Step 2: Convert to fraction form
    1,264.48/1,893.72 = 613.12/x
  3. Step 3: Cross multiply
    1,264.48x = 1,893.72 × 613.12
  4. Step 4: Simplify right side
    1,264.48x = 1,161,077.61
  5. Step 5: Solve for x
    x = 1,161,077.61/1,264.48
  6. Step 6: Final answer
    x = 918.23

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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.