Home / 1,135.20-1,702.98-519.12

Finding the Fourth Proportional to 1,135.20, 1,702.98 and 519.12

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Solution

The fourth proportional to 1,135.20, 1,702.98 and 519.12 is: 778.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.20 : 1,702.98 = 519.12 : x
  2. Step 2: Convert to fraction form
    1,135.20/1,702.98 = 519.12/x
  3. Step 3: Cross multiply
    1,135.20x = 1,702.98 × 519.12
  4. Step 4: Simplify right side
    1,135.20x = 884,050.98
  5. Step 5: Solve for x
    x = 884,050.98/1,135.20
  6. Step 6: Final answer
    x = 778.76

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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.