Home / 804,935.70-1,207,403.55-431,687.70

Finding the Fourth Proportional to 804,935.70, 1,207,403.55 and 431,687.70

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Solution

The fourth proportional to 804,935.70, 1,207,403.55 and 431,687.70 is: 647,531.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    804,935.70 : 1,207,403.55 = 431,687.70 : x
  2. Step 2: Convert to fraction form
    804,935.70/1,207,403.55 = 431,687.70/x
  3. Step 3: Cross multiply
    804,935.70x = 1,207,403.55 × 431,687.70
  4. Step 4: Simplify right side
    804,935.70x = 521,221,261,471.34
  5. Step 5: Solve for x
    x = 521,221,261,471.34/804,935.70
  6. Step 6: Final answer
    x = 647,531.55

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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.