Home / 812,982.90-1,121,825.62-450,316.78

Finding the Fourth Proportional to 812,982.90, 1,121,825.62 and 450,316.78

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Solution

The fourth proportional to 812,982.90, 1,121,825.62 and 450,316.78 is: 621,386.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,982.90 : 1,121,825.62 = 450,316.78 : x
  2. Step 2: Convert to fraction form
    812,982.90/1,121,825.62 = 450,316.78/x
  3. Step 3: Cross multiply
    812,982.90x = 1,121,825.62 × 450,316.78
  4. Step 4: Simplify right side
    812,982.90x = 505,176,900,919.90
  5. Step 5: Solve for x
    x = 505,176,900,919.90/812,982.90
  6. Step 6: Final answer
    x = 621,386.87

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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.