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Finding the Fourth Proportional to 541.20, 810.72 and 508.80

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Solution

The fourth proportional to 541.20, 810.72 and 508.80 is: 762.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    541.20 : 810.72 = 508.80 : x
  2. Step 2: Convert to fraction form
    541.20/810.72 = 508.80/x
  3. Step 3: Cross multiply
    541.20x = 810.72 × 508.80
  4. Step 4: Simplify right side
    541.20x = 412,494.34
  5. Step 5: Solve for x
    x = 412,494.34/541.20
  6. Step 6: Final answer
    x = 762.18

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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.