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Finding the Fourth Proportional to 711,772.40, 982,237.56 and 389,478.80

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Solution

The fourth proportional to 711,772.40, 982,237.56 and 389,478.80 is: 537,476.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,772.40 : 982,237.56 = 389,478.80 : x
  2. Step 2: Convert to fraction form
    711,772.40/982,237.56 = 389,478.80/x
  3. Step 3: Cross multiply
    711,772.40x = 982,237.56 × 389,478.80
  4. Step 4: Simplify right side
    711,772.40x = 382,560,706,183.73
  5. Step 5: Solve for x
    x = 382,560,706,183.73/711,772.40
  6. Step 6: Final answer
    x = 537,476.17

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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.