Home / 386,399.15-578,867.15-257,928.05

Finding the Fourth Proportional to 386,399.15, 578,867.15 and 257,928.05

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Solution

The fourth proportional to 386,399.15, 578,867.15 and 257,928.05 is: 386,403.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,399.15 : 578,867.15 = 257,928.05 : x
  2. Step 2: Convert to fraction form
    386,399.15/578,867.15 = 257,928.05/x
  3. Step 3: Cross multiply
    386,399.15x = 578,867.15 × 257,928.05
  4. Step 4: Simplify right side
    386,399.15x = 149,306,075,366.09
  5. Step 5: Solve for x
    x = 149,306,075,366.09/386,399.15
  6. Step 6: Final answer
    x = 386,403.73

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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.