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Finding the Fourth Proportional to 540.24, 805.74 and 491.28

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Solution

The fourth proportional to 540.24, 805.74 and 491.28 is: 732.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.24 : 805.74 = 491.28 : x
  2. Step 2: Convert to fraction form
    540.24/805.74 = 491.28/x
  3. Step 3: Cross multiply
    540.24x = 805.74 × 491.28
  4. Step 4: Simplify right side
    540.24x = 395,843.95
  5. Step 5: Solve for x
    x = 395,843.95/540.24
  6. Step 6: Final answer
    x = 732.72

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.