Home / 1,269.50-1,904.38-539.15

Finding the Fourth Proportional to 1,269.50, 1,904.38 and 539.15

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Solution

The fourth proportional to 1,269.50, 1,904.38 and 539.15 is: 808.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,269.50 : 1,904.38 = 539.15 : x
  2. Step 2: Convert to fraction form
    1,269.50/1,904.38 = 539.15/x
  3. Step 3: Cross multiply
    1,269.50x = 1,904.38 × 539.15
  4. Step 4: Simplify right side
    1,269.50x = 1,026,735.61
  5. Step 5: Solve for x
    x = 1,026,735.61/1,269.50
  6. Step 6: Final answer
    x = 808.77

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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.