Home / 855,378.32-1,282,382.41-428,695.11

Finding the Fourth Proportional to 855,378.32, 1,282,382.41 and 428,695.11

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Solution

The fourth proportional to 855,378.32, 1,282,382.41 and 428,695.11 is: 642,699.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    855,378.32 : 1,282,382.41 = 428,695.11 : x
  2. Step 2: Convert to fraction form
    855,378.32/1,282,382.41 = 428,695.11/x
  3. Step 3: Cross multiply
    855,378.32x = 1,282,382.41 × 428,695.11
  4. Step 4: Simplify right side
    855,378.32x = 549,751,073,661.82
  5. Step 5: Solve for x
    x = 549,751,073,661.82/855,378.32
  6. Step 6: Final answer
    x = 642,699.33

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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.