Home / 811,876.20-1,120,839.54-489,667.56

Finding the Fourth Proportional to 811,876.20, 1,120,839.54 and 489,667.56

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Solution

The fourth proportional to 811,876.20, 1,120,839.54 and 489,667.56 is: 676,012.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,876.20 : 1,120,839.54 = 489,667.56 : x
  2. Step 2: Convert to fraction form
    811,876.20/1,120,839.54 = 489,667.56/x
  3. Step 3: Cross multiply
    811,876.20x = 1,120,839.54 × 489,667.56
  4. Step 4: Simplify right side
    811,876.20x = 548,838,762,703.32
  5. Step 5: Solve for x
    x = 548,838,762,703.32/811,876.20
  6. Step 6: Final answer
    x = 676,012.87

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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.