Home / 786,321.40-1,180,356.90-487,139.80

Finding the Fourth Proportional to 786,321.40, 1,180,356.90 and 487,139.80

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Solution

The fourth proportional to 786,321.40, 1,180,356.90 and 487,139.80 is: 731,251.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,321.40 : 1,180,356.90 = 487,139.80 : x
  2. Step 2: Convert to fraction form
    786,321.40/1,180,356.90 = 487,139.80/x
  3. Step 3: Cross multiply
    786,321.40x = 1,180,356.90 × 487,139.80
  4. Step 4: Simplify right side
    786,321.40x = 574,998,824,194.62
  5. Step 5: Solve for x
    x = 574,998,824,194.62/786,321.40
  6. Step 6: Final answer
    x = 731,251.65

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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.