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Finding the Fourth Proportional to 1,101.80, 1,652.80 and 452.40

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Solution

The fourth proportional to 1,101.80, 1,652.80 and 452.40 is: 678.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.80 : 1,652.80 = 452.40 : x
  2. Step 2: Convert to fraction form
    1,101.80/1,652.80 = 452.40/x
  3. Step 3: Cross multiply
    1,101.80x = 1,652.80 × 452.40
  4. Step 4: Simplify right side
    1,101.80x = 747,726.72
  5. Step 5: Solve for x
    x = 747,726.72/1,101.80
  6. Step 6: Final answer
    x = 678.64

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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.