Home / 812,139.54-1,120,755.13-439,602.42

Finding the Fourth Proportional to 812,139.54, 1,120,755.13 and 439,602.42

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Solution

The fourth proportional to 812,139.54, 1,120,755.13 and 439,602.42 is: 606,652.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,139.54 : 1,120,755.13 = 439,602.42 : x
  2. Step 2: Convert to fraction form
    812,139.54/1,120,755.13 = 439,602.42/x
  3. Step 3: Cross multiply
    812,139.54x = 1,120,755.13 × 439,602.42
  4. Step 4: Simplify right side
    812,139.54x = 492,686,667,375.42
  5. Step 5: Solve for x
    x = 492,686,667,375.42/812,139.54
  6. Step 6: Final answer
    x = 606,652.73

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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.