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Finding the Fourth Proportional to 1,026.07, 1,539.11 and 256.57

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Solution

The fourth proportional to 1,026.07, 1,539.11 and 256.57 is: 384.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,026.07 : 1,539.11 = 256.57 : x
  2. Step 2: Convert to fraction form
    1,026.07/1,539.11 = 256.57/x
  3. Step 3: Cross multiply
    1,026.07x = 1,539.11 × 256.57
  4. Step 4: Simplify right side
    1,026.07x = 394,889.45
  5. Step 5: Solve for x
    x = 394,889.45/1,026.07
  6. Step 6: Final answer
    x = 384.86

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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.