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Finding the Fourth Proportional to 540.02, 745.18 and 318.94

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Solution

The fourth proportional to 540.02, 745.18 and 318.94 is: 440.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.02 : 745.18 = 318.94 : x
  2. Step 2: Convert to fraction form
    540.02/745.18 = 318.94/x
  3. Step 3: Cross multiply
    540.02x = 745.18 × 318.94
  4. Step 4: Simplify right side
    540.02x = 237,665.05
  5. Step 5: Solve for x
    x = 237,665.05/540.02
  6. Step 6: Final answer
    x = 440.10

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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.