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Finding the Fourth Proportional to 540.10, 745.69 and 415.53

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Solution

The fourth proportional to 540.10, 745.69 and 415.53 is: 573.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.10 : 745.69 = 415.53 : x
  2. Step 2: Convert to fraction form
    540.10/745.69 = 415.53/x
  3. Step 3: Cross multiply
    540.10x = 745.69 × 415.53
  4. Step 4: Simplify right side
    540.10x = 309,856.57
  5. Step 5: Solve for x
    x = 309,856.57/540.10
  6. Step 6: Final answer
    x = 573.70

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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.