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Finding the Fourth Proportional to 1,027.96, 1,539.18 and 539.98

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Solution

The fourth proportional to 1,027.96, 1,539.18 and 539.98 is: 808.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,027.96 : 1,539.18 = 539.98 : x
  2. Step 2: Convert to fraction form
    1,027.96/1,539.18 = 539.98/x
  3. Step 3: Cross multiply
    1,027.96x = 1,539.18 × 539.98
  4. Step 4: Simplify right side
    1,027.96x = 831,126.42
  5. Step 5: Solve for x
    x = 831,126.42/1,027.96
  6. Step 6: Final answer
    x = 808.52

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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.