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Finding the Fourth Proportional to 1,513.88, 2,270.45 and 418.34

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Solution

The fourth proportional to 1,513.88, 2,270.45 and 418.34 is: 627.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,513.88 : 2,270.45 = 418.34 : x
  2. Step 2: Convert to fraction form
    1,513.88/2,270.45 = 418.34/x
  3. Step 3: Cross multiply
    1,513.88x = 2,270.45 × 418.34
  4. Step 4: Simplify right side
    1,513.88x = 949,806.61
  5. Step 5: Solve for x
    x = 949,806.61/1,513.88
  6. Step 6: Final answer
    x = 627.40

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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.