Home / 1,187,257.20-1,781,058.60-388,345.20

Finding the Fourth Proportional to 1,187,257.20, 1,781,058.60 and 388,345.20

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Solution

The fourth proportional to 1,187,257.20, 1,781,058.60 and 388,345.20 is: 582,574.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,257.20 : 1,781,058.60 = 388,345.20 : x
  2. Step 2: Convert to fraction form
    1,187,257.20/1,781,058.60 = 388,345.20/x
  3. Step 3: Cross multiply
    1,187,257.20x = 1,781,058.60 × 388,345.20
  4. Step 4: Simplify right side
    1,187,257.20x = 691,665,558,228.72
  5. Step 5: Solve for x
    x = 691,665,558,228.72/1,187,257.20
  6. Step 6: Final answer
    x = 582,574.32

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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.