Home / 876,286.40-1,208,991.84-489,038.90

Finding the Fourth Proportional to 876,286.40, 1,208,991.84 and 489,038.90

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Solution

The fourth proportional to 876,286.40, 1,208,991.84 and 489,038.90 is: 674,715.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,286.40 : 1,208,991.84 = 489,038.90 : x
  2. Step 2: Convert to fraction form
    876,286.40/1,208,991.84 = 489,038.90/x
  3. Step 3: Cross multiply
    876,286.40x = 1,208,991.84 × 489,038.90
  4. Step 4: Simplify right side
    876,286.40x = 591,244,039,542.58
  5. Step 5: Solve for x
    x = 591,244,039,542.58/876,286.40
  6. Step 6: Final answer
    x = 674,715.53

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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.