Home / 578,808.40-867,046.20-389,851.60

Finding the Fourth Proportional to 578,808.40, 867,046.20 and 389,851.60

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Solution

The fourth proportional to 578,808.40, 867,046.20 and 389,851.60 is: 583,991.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,808.40 : 867,046.20 = 389,851.60 : x
  2. Step 2: Convert to fraction form
    578,808.40/867,046.20 = 389,851.60/x
  3. Step 3: Cross multiply
    578,808.40x = 867,046.20 × 389,851.60
  4. Step 4: Simplify right side
    578,808.40x = 338,019,348,343.92
  5. Step 5: Solve for x
    x = 338,019,348,343.92/578,808.40
  6. Step 6: Final answer
    x = 583,991.78

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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.