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Finding the Fourth Proportional to 540.50, 810.70 and 280.42

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Solution

The fourth proportional to 540.50, 810.70 and 280.42 is: 420.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.50 : 810.70 = 280.42 : x
  2. Step 2: Convert to fraction form
    540.50/810.70 = 280.42/x
  3. Step 3: Cross multiply
    540.50x = 810.70 × 280.42
  4. Step 4: Simplify right side
    540.50x = 227,333.77
  5. Step 5: Solve for x
    x = 227,333.77/540.50
  6. Step 6: Final answer
    x = 420.60

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1.5x scale

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.