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Finding the Fourth Proportional to 1,097.47, 1,645.80 and 403.90

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Solution

The fourth proportional to 1,097.47, 1,645.80 and 403.90 is: 605.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,097.47 : 1,645.80 = 403.90 : x
  2. Step 2: Convert to fraction form
    1,097.47/1,645.80 = 403.90/x
  3. Step 3: Cross multiply
    1,097.47x = 1,645.80 × 403.90
  4. Step 4: Simplify right side
    1,097.47x = 664,738.62
  5. Step 5: Solve for x
    x = 664,738.62/1,097.47
  6. Step 6: Final answer
    x = 605.70

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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.