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Finding the Fourth Proportional to 1,026.74, 1,539.48 and 409.74

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Solution

The fourth proportional to 1,026.74, 1,539.48 and 409.74 is: 614.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,026.74 : 1,539.48 = 409.74 : x
  2. Step 2: Convert to fraction form
    1,026.74/1,539.48 = 409.74/x
  3. Step 3: Cross multiply
    1,026.74x = 1,539.48 × 409.74
  4. Step 4: Simplify right side
    1,026.74x = 630,786.54
  5. Step 5: Solve for x
    x = 630,786.54/1,026.74
  6. Step 6: Final answer
    x = 614.36

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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.