Home / 819,998.70-1,131,143.31-480,401.34

Finding the Fourth Proportional to 819,998.70, 1,131,143.31 and 480,401.34

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Solution

The fourth proportional to 819,998.70, 1,131,143.31 and 480,401.34 is: 662,687.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,998.70 : 1,131,143.31 = 480,401.34 : x
  2. Step 2: Convert to fraction form
    819,998.70/1,131,143.31 = 480,401.34/x
  3. Step 3: Cross multiply
    819,998.70x = 1,131,143.31 × 480,401.34
  4. Step 4: Simplify right side
    819,998.70x = 543,402,761,856.04
  5. Step 5: Solve for x
    x = 543,402,761,856.04/819,998.70
  6. Step 6: Final answer
    x = 662,687.35

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Double scale
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Similar ratio
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1.5x scale

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.