Home / 766,342.74-1,147,458.39-428,421

Finding the Fourth Proportional to 766,342.74, 1,147,458.39 and 428,421

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Solution

The fourth proportional to 766,342.74, 1,147,458.39 and 428,421 is: 641,482.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    766,342.74 : 1,147,458.39 = 428,421 : x
  2. Step 2: Convert to fraction form
    766,342.74/1,147,458.39 = 428,421/x
  3. Step 3: Cross multiply
    766,342.74x = 1,147,458.39 × 428,421
  4. Step 4: Simplify right side
    766,342.74x = 491,595,270,902.19
  5. Step 5: Solve for x
    x = 491,595,270,902.19/766,342.74
  6. Step 6: Final answer
    x = 641,482.26

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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.