Home / 711,974.96-982,487.60-389,622.78

Finding the Fourth Proportional to 711,974.96, 982,487.60 and 389,622.78

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Solution

The fourth proportional to 711,974.96, 982,487.60 and 389,622.78 is: 537,658.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,974.96 : 982,487.60 = 389,622.78 : x
  2. Step 2: Convert to fraction form
    711,974.96/982,487.60 = 389,622.78/x
  3. Step 3: Cross multiply
    711,974.96x = 982,487.60 × 389,622.78
  4. Step 4: Simplify right side
    711,974.96x = 382,799,550,027.53
  5. Step 5: Solve for x
    x = 382,799,550,027.53/711,974.96
  6. Step 6: Final answer
    x = 537,658.73

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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.