Home / 1,211.40-1,815.66-560.79

Finding the Fourth Proportional to 1,211.40, 1,815.66 and 560.79

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Solution

The fourth proportional to 1,211.40, 1,815.66 and 560.79 is: 840.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.40 : 1,815.66 = 560.79 : x
  2. Step 2: Convert to fraction form
    1,211.40/1,815.66 = 560.79/x
  3. Step 3: Cross multiply
    1,211.40x = 1,815.66 × 560.79
  4. Step 4: Simplify right side
    1,211.40x = 1,018,203.97
  5. Step 5: Solve for x
    x = 1,018,203.97/1,211.40
  6. Step 6: Final answer
    x = 840.52

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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.