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Finding the Fourth Proportional to 899.61, 1,241.49 and 545.45

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Solution

The fourth proportional to 899.61, 1,241.49 and 545.45 is: 752.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.61 : 1,241.49 = 545.45 : x
  2. Step 2: Convert to fraction form
    899.61/1,241.49 = 545.45/x
  3. Step 3: Cross multiply
    899.61x = 1,241.49 × 545.45
  4. Step 4: Simplify right side
    899.61x = 677,167.12
  5. Step 5: Solve for x
    x = 677,167.12/899.61
  6. Step 6: Final answer
    x = 752.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.