Home / 821,448.60-1,231,251.30-348,053.40

Finding the Fourth Proportional to 821,448.60, 1,231,251.30 and 348,053.40

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Solution

The fourth proportional to 821,448.60, 1,231,251.30 and 348,053.40 is: 521,689.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,448.60 : 1,231,251.30 = 348,053.40 : x
  2. Step 2: Convert to fraction form
    821,448.60/1,231,251.30 = 348,053.40/x
  3. Step 3: Cross multiply
    821,448.60x = 1,231,251.30 × 348,053.40
  4. Step 4: Simplify right side
    821,448.60x = 428,541,201,219.42
  5. Step 5: Solve for x
    x = 428,541,201,219.42/821,448.60
  6. Step 6: Final answer
    x = 521,689.61

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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.