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Finding the Fourth Proportional to 340.96, 509.35 and 272.61

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Solution

The fourth proportional to 340.96, 509.35 and 272.61 is: 407.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.96 : 509.35 = 272.61 : x
  2. Step 2: Convert to fraction form
    340.96/509.35 = 272.61/x
  3. Step 3: Cross multiply
    340.96x = 509.35 × 272.61
  4. Step 4: Simplify right side
    340.96x = 138,853.90
  5. Step 5: Solve for x
    x = 138,853.90/340.96
  6. Step 6: Final answer
    x = 407.24

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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.