Home / 657,905.12-986,960.64-278,826.56

Finding the Fourth Proportional to 657,905.12, 986,960.64 and 278,826.56

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Solution

The fourth proportional to 657,905.12, 986,960.64 and 278,826.56 is: 418,283.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,905.12 : 986,960.64 = 278,826.56 : x
  2. Step 2: Convert to fraction form
    657,905.12/986,960.64 = 278,826.56/x
  3. Step 3: Cross multiply
    657,905.12x = 986,960.64 × 278,826.56
  4. Step 4: Simplify right side
    657,905.12x = 275,190,840,106.60
  5. Step 5: Solve for x
    x = 275,190,840,106.60/657,905.12
  6. Step 6: Final answer
    x = 418,283.48

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1.5x scale

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.