Home / 690,648.80-953,139.15-418,742.73

Finding the Fourth Proportional to 690,648.80, 953,139.15 and 418,742.73

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Solution

The fourth proportional to 690,648.80, 953,139.15 and 418,742.73 is: 577,891.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,648.80 : 953,139.15 = 418,742.73 : x
  2. Step 2: Convert to fraction form
    690,648.80/953,139.15 = 418,742.73/x
  3. Step 3: Cross multiply
    690,648.80x = 953,139.15 × 418,742.73
  4. Step 4: Simplify right side
    690,648.80x = 399,120,089,740.88
  5. Step 5: Solve for x
    x = 399,120,089,740.88/690,648.80
  6. Step 6: Final answer
    x = 577,891.53

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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.