Home / 876,667.30-1,209,789.40-489,489.33

Finding the Fourth Proportional to 876,667.30, 1,209,789.40 and 489,489.33

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Solution

The fourth proportional to 876,667.30, 1,209,789.40 and 489,489.33 is: 675,488.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,667.30 : 1,209,789.40 = 489,489.33 : x
  2. Step 2: Convert to fraction form
    876,667.30/1,209,789.40 = 489,489.33/x
  3. Step 3: Cross multiply
    876,667.30x = 1,209,789.40 × 489,489.33
  4. Step 4: Simplify right side
    876,667.30x = 592,178,998,896.13
  5. Step 5: Solve for x
    x = 592,178,998,896.13/876,667.30
  6. Step 6: Final answer
    x = 675,488.86

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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.