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Finding the Fourth Proportional to 540.66, 746.10 and 307.78

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Solution

The fourth proportional to 540.66, 746.10 and 307.78 is: 424.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.66 : 746.10 = 307.78 : x
  2. Step 2: Convert to fraction form
    540.66/746.10 = 307.78/x
  3. Step 3: Cross multiply
    540.66x = 746.10 × 307.78
  4. Step 4: Simplify right side
    540.66x = 229,634.66
  5. Step 5: Solve for x
    x = 229,634.66/540.66
  6. Step 6: Final answer
    x = 424.73

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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.