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Finding the Fourth Proportional to 407.85, 610.72 and 270.47

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Solution

The fourth proportional to 407.85, 610.72 and 270.47 is: 405.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.85 : 610.72 = 270.47 : x
  2. Step 2: Convert to fraction form
    407.85/610.72 = 270.47/x
  3. Step 3: Cross multiply
    407.85x = 610.72 × 270.47
  4. Step 4: Simplify right side
    407.85x = 165,178.38
  5. Step 5: Solve for x
    x = 165,178.38/407.85
  6. Step 6: Final answer
    x = 405.00

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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.