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Finding the Fourth Proportional to 540.80, 810.36 and 479.24

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Solution

The fourth proportional to 540.80, 810.36 and 479.24 is: 718.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.80 : 810.36 = 479.24 : x
  2. Step 2: Convert to fraction form
    540.80/810.36 = 479.24/x
  3. Step 3: Cross multiply
    540.80x = 810.36 × 479.24
  4. Step 4: Simplify right side
    540.80x = 388,356.93
  5. Step 5: Solve for x
    x = 388,356.93/540.80
  6. Step 6: Final answer
    x = 718.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.