Home / 1,435.52-2,155.26-742.76

Finding the Fourth Proportional to 1,435.52, 2,155.26 and 742.76

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Solution

The fourth proportional to 1,435.52, 2,155.26 and 742.76 is: 1,115.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,435.52 : 2,155.26 = 742.76 : x
  2. Step 2: Convert to fraction form
    1,435.52/2,155.26 = 742.76/x
  3. Step 3: Cross multiply
    1,435.52x = 2,155.26 × 742.76
  4. Step 4: Simplify right side
    1,435.52x = 1,600,840.92
  5. Step 5: Solve for x
    x = 1,600,840.92/1,435.52
  6. Step 6: Final answer
    x = 1,115.16

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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.