Home / 821,126.40-1,231,433.60-322,643.20

Finding the Fourth Proportional to 821,126.40, 1,231,433.60 and 322,643.20

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Solution

The fourth proportional to 821,126.40, 1,231,433.60 and 322,643.20 is: 483,864.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,126.40 : 1,231,433.60 = 322,643.20 : x
  2. Step 2: Convert to fraction form
    821,126.40/1,231,433.60 = 322,643.20/x
  3. Step 3: Cross multiply
    821,126.40x = 1,231,433.60 × 322,643.20
  4. Step 4: Simplify right side
    821,126.40x = 397,313,677,291.52
  5. Step 5: Solve for x
    x = 397,313,677,291.52/821,126.40
  6. Step 6: Final answer
    x = 483,864.21

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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.