Home / 1,187,065.76-1,638,181.25-728,433.74

Finding the Fourth Proportional to 1,187,065.76, 1,638,181.25 and 728,433.74

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Solution

The fourth proportional to 1,187,065.76, 1,638,181.25 and 728,433.74 is: 1,005,257.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,065.76 : 1,638,181.25 = 728,433.74 : x
  2. Step 2: Convert to fraction form
    1,187,065.76/1,638,181.25 = 728,433.74/x
  3. Step 3: Cross multiply
    1,187,065.76x = 1,638,181.25 × 728,433.74
  4. Step 4: Simplify right side
    1,187,065.76x = 1,193,306,497,920.29
  5. Step 5: Solve for x
    x = 1,193,306,497,920.29/1,187,065.76
  6. Step 6: Final answer
    x = 1,005,257.28

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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.