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Finding the Fourth Proportional to 540.48, 745.92 and 307.68

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Solution

The fourth proportional to 540.48, 745.92 and 307.68 is: 424.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.48 : 745.92 = 307.68 : x
  2. Step 2: Convert to fraction form
    540.48/745.92 = 307.68/x
  3. Step 3: Cross multiply
    540.48x = 745.92 × 307.68
  4. Step 4: Simplify right side
    540.48x = 229,504.67
  5. Step 5: Solve for x
    x = 229,504.67/540.48
  6. Step 6: Final answer
    x = 424.63

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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.