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Finding the Fourth Proportional to 1,026.18, 1,539.72 and 539.12

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Solution

The fourth proportional to 1,026.18, 1,539.72 and 539.12 is: 808.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,026.18 : 1,539.72 = 539.12 : x
  2. Step 2: Convert to fraction form
    1,026.18/1,539.72 = 539.12/x
  3. Step 3: Cross multiply
    1,026.18x = 1,539.72 × 539.12
  4. Step 4: Simplify right side
    1,026.18x = 830,086.15
  5. Step 5: Solve for x
    x = 830,086.15/1,026.18
  6. Step 6: Final answer
    x = 808.91

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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.