Home / 257,716.20-386,574.30-139,618.20

Finding the Fourth Proportional to 257,716.20, 386,574.30 and 139,618.20

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Solution

The fourth proportional to 257,716.20, 386,574.30 and 139,618.20 is: 209,427.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,716.20 : 386,574.30 = 139,618.20 : x
  2. Step 2: Convert to fraction form
    257,716.20/386,574.30 = 139,618.20/x
  3. Step 3: Cross multiply
    257,716.20x = 386,574.30 × 139,618.20
  4. Step 4: Simplify right side
    257,716.20x = 53,972,807,932.26
  5. Step 5: Solve for x
    x = 53,972,807,932.26/257,716.20
  6. Step 6: Final answer
    x = 209,427.30

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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.