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Finding the Fourth Proportional to 714,770.70, 986,338.71 and 392,478.54

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Solution

The fourth proportional to 714,770.70, 986,338.71 and 392,478.54 is: 541,595.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,770.70 : 986,338.71 = 392,478.54 : x
  2. Step 2: Convert to fraction form
    714,770.70/986,338.71 = 392,478.54/x
  3. Step 3: Cross multiply
    714,770.70x = 986,338.71 × 392,478.54
  4. Step 4: Simplify right side
    714,770.70x = 387,116,776,846.28
  5. Step 5: Solve for x
    x = 387,116,776,846.28/714,770.70
  6. Step 6: Final answer
    x = 541,595.75

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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.