Home / 1,455.10-2,171.38-1,407.76

Finding the Fourth Proportional to 1,455.10, 2,171.38 and 1,407.76

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Solution

The fourth proportional to 1,455.10, 2,171.38 and 1,407.76 is: 2,100.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,455.10 : 2,171.38 = 1,407.76 : x
  2. Step 2: Convert to fraction form
    1,455.10/2,171.38 = 1,407.76/x
  3. Step 3: Cross multiply
    1,455.10x = 2,171.38 × 1,407.76
  4. Step 4: Simplify right side
    1,455.10x = 3,056,781.91
  5. Step 5: Solve for x
    x = 3,056,781.91/1,455.10
  6. Step 6: Final answer
    x = 2,100.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.