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Finding the Fourth Proportional to 949.40, 1,424.19 and 256.07

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Solution

The fourth proportional to 949.40, 1,424.19 and 256.07 is: 384.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.40 : 1,424.19 = 256.07 : x
  2. Step 2: Convert to fraction form
    949.40/1,424.19 = 256.07/x
  3. Step 3: Cross multiply
    949.40x = 1,424.19 × 256.07
  4. Step 4: Simplify right side
    949.40x = 364,691.05
  5. Step 5: Solve for x
    x = 364,691.05/949.40
  6. Step 6: Final answer
    x = 384.13

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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.