Home / 721,146.81-1,081,711.71-300,422.70

Finding the Fourth Proportional to 721,146.81, 1,081,711.71 and 300,422.70

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Solution

The fourth proportional to 721,146.81, 1,081,711.71 and 300,422.70 is: 450,630.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,146.81 : 1,081,711.71 = 300,422.70 : x
  2. Step 2: Convert to fraction form
    721,146.81/1,081,711.71 = 300,422.70/x
  3. Step 3: Cross multiply
    721,146.81x = 1,081,711.71 × 300,422.70
  4. Step 4: Simplify right side
    721,146.81x = 324,970,752,539.82
  5. Step 5: Solve for x
    x = 324,970,752,539.82/721,146.81
  6. Step 6: Final answer
    x = 450,630.51

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1.5x scale

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.