Home / 257,799.28-386,698.95-80,320.60

Finding the Fourth Proportional to 257,799.28, 386,698.95 and 80,320.60

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Solution

The fourth proportional to 257,799.28, 386,698.95 and 80,320.60 is: 120,480.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,799.28 : 386,698.95 = 80,320.60 : x
  2. Step 2: Convert to fraction form
    257,799.28/386,698.95 = 80,320.60/x
  3. Step 3: Cross multiply
    257,799.28x = 386,698.95 × 80,320.60
  4. Step 4: Simplify right side
    257,799.28x = 31,059,891,683.37
  5. Step 5: Solve for x
    x = 31,059,891,683.37/257,799.28
  6. Step 6: Final answer
    x = 120,480.91

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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.