Home / 878,458.87-1,212,264.66-491,269.86

Finding the Fourth Proportional to 878,458.87, 1,212,264.66 and 491,269.86

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Solution

The fourth proportional to 878,458.87, 1,212,264.66 and 491,269.86 is: 677,947.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,458.87 : 1,212,264.66 = 491,269.86 : x
  2. Step 2: Convert to fraction form
    878,458.87/1,212,264.66 = 491,269.86/x
  3. Step 3: Cross multiply
    878,458.87x = 1,212,264.66 × 491,269.86
  4. Step 4: Simplify right side
    878,458.87x = 595,549,091,643.41
  5. Step 5: Solve for x
    x = 595,549,091,643.41/878,458.87
  6. Step 6: Final answer
    x = 677,947.61

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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.