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Finding the Fourth Proportional to 540.13, 745.19 and 307.12

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Solution

The fourth proportional to 540.13, 745.19 and 307.12 is: 423.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.13 : 745.19 = 307.12 : x
  2. Step 2: Convert to fraction form
    540.13/745.19 = 307.12/x
  3. Step 3: Cross multiply
    540.13x = 745.19 × 307.12
  4. Step 4: Simplify right side
    540.13x = 228,861.22
  5. Step 5: Solve for x
    x = 228,861.22/540.13
  6. Step 6: Final answer
    x = 423.72

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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.