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Finding the Fourth Proportional to 540.80, 746.26 and 307.96

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Solution

The fourth proportional to 540.80, 746.26 and 307.96 is: 424.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.80 : 746.26 = 307.96 : x
  2. Step 2: Convert to fraction form
    540.80/746.26 = 307.96/x
  3. Step 3: Cross multiply
    540.80x = 746.26 × 307.96
  4. Step 4: Simplify right side
    540.80x = 229,818.23
  5. Step 5: Solve for x
    x = 229,818.23/540.80
  6. Step 6: Final answer
    x = 424.96

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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.