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Finding the Fourth Proportional to 271.13, 407.21 and 260.03

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Solution

The fourth proportional to 271.13, 407.21 and 260.03 is: 390.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.13 : 407.21 = 260.03 : x
  2. Step 2: Convert to fraction form
    271.13/407.21 = 260.03/x
  3. Step 3: Cross multiply
    271.13x = 407.21 × 260.03
  4. Step 4: Simplify right side
    271.13x = 105,886.53
  5. Step 5: Solve for x
    x = 105,886.53/271.13
  6. Step 6: Final answer
    x = 390.55

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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.