Home / 1,393,840.66-1,921,464.12-985,221.58

Finding the Fourth Proportional to 1,393,840.66, 1,921,464.12 and 985,221.58

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Solution

The fourth proportional to 1,393,840.66, 1,921,464.12 and 985,221.58 is: 1,358,166.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393,840.66 : 1,921,464.12 = 985,221.58 : x
  2. Step 2: Convert to fraction form
    1,393,840.66/1,921,464.12 = 985,221.58/x
  3. Step 3: Cross multiply
    1,393,840.66x = 1,921,464.12 × 985,221.58
  4. Step 4: Simplify right side
    1,393,840.66x = 1,893,067,916,219.71
  5. Step 5: Solve for x
    x = 1,893,067,916,219.71/1,393,840.66
  6. Step 6: Final answer
    x = 1,358,166.66

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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.