Home / 1,211.20-1,815.12-560.56

Finding the Fourth Proportional to 1,211.20, 1,815.12 and 560.56

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Solution

The fourth proportional to 1,211.20, 1,815.12 and 560.56 is: 840.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.20 : 1,815.12 = 560.56 : x
  2. Step 2: Convert to fraction form
    1,211.20/1,815.12 = 560.56/x
  3. Step 3: Cross multiply
    1,211.20x = 1,815.12 × 560.56
  4. Step 4: Simplify right side
    1,211.20x = 1,017,483.67
  5. Step 5: Solve for x
    x = 1,017,483.67/1,211.20
  6. Step 6: Final answer
    x = 840.06

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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.