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Finding the Fourth Proportional to 718.44, 1,077.48 and 256.20

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Solution

The fourth proportional to 718.44, 1,077.48 and 256.20 is: 384.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.44 : 1,077.48 = 256.20 : x
  2. Step 2: Convert to fraction form
    718.44/1,077.48 = 256.20/x
  3. Step 3: Cross multiply
    718.44x = 1,077.48 × 256.20
  4. Step 4: Simplify right side
    718.44x = 276,050.38
  5. Step 5: Solve for x
    x = 276,050.38/718.44
  6. Step 6: Final answer
    x = 384.24

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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.