Home / 689,285.42-951,151.12-398,846.78

Finding the Fourth Proportional to 689,285.42, 951,151.12 and 398,846.78

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Solution

The fourth proportional to 689,285.42, 951,151.12 and 398,846.78 is: 550,372.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,285.42 : 951,151.12 = 398,846.78 : x
  2. Step 2: Convert to fraction form
    689,285.42/951,151.12 = 398,846.78/x
  3. Step 3: Cross multiply
    689,285.42x = 951,151.12 × 398,846.78
  4. Step 4: Simplify right side
    689,285.42x = 379,363,561,505.39
  5. Step 5: Solve for x
    x = 379,363,561,505.39/689,285.42
  6. Step 6: Final answer
    x = 550,372.24

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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.