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Finding the Fourth Proportional to 1,026.55, 1,539.98 and 539.64

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Solution

The fourth proportional to 1,026.55, 1,539.98 and 539.64 is: 809.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,026.55 : 1,539.98 = 539.64 : x
  2. Step 2: Convert to fraction form
    1,026.55/1,539.98 = 539.64/x
  3. Step 3: Cross multiply
    1,026.55x = 1,539.98 × 539.64
  4. Step 4: Simplify right side
    1,026.55x = 831,034.81
  5. Step 5: Solve for x
    x = 831,034.81/1,026.55
  6. Step 6: Final answer
    x = 809.54

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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.