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Finding the Fourth Proportional to 1,146.28, 1,718.70 and 415.48

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Solution

The fourth proportional to 1,146.28, 1,718.70 and 415.48 is: 622.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.28 : 1,718.70 = 415.48 : x
  2. Step 2: Convert to fraction form
    1,146.28/1,718.70 = 415.48/x
  3. Step 3: Cross multiply
    1,146.28x = 1,718.70 × 415.48
  4. Step 4: Simplify right side
    1,146.28x = 714,085.48
  5. Step 5: Solve for x
    x = 714,085.48/1,146.28
  6. Step 6: Final answer
    x = 622.96

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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.