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Finding the Fourth Proportional to 540.12, 745.38 and 319.12

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Solution

The fourth proportional to 540.12, 745.38 and 319.12 is: 440.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.12 : 745.38 = 319.12 : x
  2. Step 2: Convert to fraction form
    540.12/745.38 = 319.12/x
  3. Step 3: Cross multiply
    540.12x = 745.38 × 319.12
  4. Step 4: Simplify right side
    540.12x = 237,865.67
  5. Step 5: Solve for x
    x = 237,865.67/540.12
  6. Step 6: Final answer
    x = 440.39

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1.5x scale

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.