Home / 780,456.20-1,170,101.10-425,870.60

Finding the Fourth Proportional to 780,456.20, 1,170,101.10 and 425,870.60

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Solution

The fourth proportional to 780,456.20, 1,170,101.10 and 425,870.60 is: 638,487.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,456.20 : 1,170,101.10 = 425,870.60 : x
  2. Step 2: Convert to fraction form
    780,456.20/1,170,101.10 = 425,870.60/x
  3. Step 3: Cross multiply
    780,456.20x = 1,170,101.10 × 425,870.60
  4. Step 4: Simplify right side
    780,456.20x = 498,311,657,517.66
  5. Step 5: Solve for x
    x = 498,311,657,517.66/780,456.20
  6. Step 6: Final answer
    x = 638,487.67

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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.