Home / 1,560.11-2,340.15-405.86

Finding the Fourth Proportional to 1,560.11, 2,340.15 and 405.86

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Solution

The fourth proportional to 1,560.11, 2,340.15 and 405.86 is: 608.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,560.11 : 2,340.15 = 405.86 : x
  2. Step 2: Convert to fraction form
    1,560.11/2,340.15 = 405.86/x
  3. Step 3: Cross multiply
    1,560.11x = 2,340.15 × 405.86
  4. Step 4: Simplify right side
    1,560.11x = 949,761.58
  5. Step 5: Solve for x
    x = 949,761.58/1,560.11
  6. Step 6: Final answer
    x = 608.78

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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.