Home / 712,151.68-982,786.63-389,860.78

Finding the Fourth Proportional to 712,151.68, 982,786.63 and 389,860.78

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Solution

The fourth proportional to 712,151.68, 982,786.63 and 389,860.78 is: 538,017.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,151.68 : 982,786.63 = 389,860.78 : x
  2. Step 2: Convert to fraction form
    712,151.68/982,786.63 = 389,860.78/x
  3. Step 3: Cross multiply
    712,151.68x = 982,786.63 × 389,860.78
  4. Step 4: Simplify right side
    712,151.68x = 383,149,962,145.37
  5. Step 5: Solve for x
    x = 383,149,962,145.37/712,151.68
  6. Step 6: Final answer
    x = 538,017.35

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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.