Home / 1,128,579.72-1,557,439.92-645,155.66

Finding the Fourth Proportional to 1,128,579.72, 1,557,439.92 and 645,155.66

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Solution

The fourth proportional to 1,128,579.72, 1,557,439.92 and 645,155.66 is: 890,314.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128,579.72 : 1,557,439.92 = 645,155.66 : x
  2. Step 2: Convert to fraction form
    1,128,579.72/1,557,439.92 = 645,155.66/x
  3. Step 3: Cross multiply
    1,128,579.72x = 1,557,439.92 × 645,155.66
  4. Step 4: Simplify right side
    1,128,579.72x = 1,004,791,179,497.95
  5. Step 5: Solve for x
    x = 1,004,791,179,497.95/1,128,579.72
  6. Step 6: Final answer
    x = 890,314.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.