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Finding the Fourth Proportional to 1,025.85, 1,539.90 and 538.77

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Solution

The fourth proportional to 1,025.85, 1,539.90 and 538.77 is: 808.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,025.85 : 1,539.90 = 538.77 : x
  2. Step 2: Convert to fraction form
    1,025.85/1,539.90 = 538.77/x
  3. Step 3: Cross multiply
    1,025.85x = 1,539.90 × 538.77
  4. Step 4: Simplify right side
    1,025.85x = 829,651.92
  5. Step 5: Solve for x
    x = 829,651.92/1,025.85
  6. Step 6: Final answer
    x = 808.75

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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.