Home / 1,218,288.38-1,681,257.78-666,994.82

Finding the Fourth Proportional to 1,218,288.38, 1,681,257.78 and 666,994.82

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Solution

The fourth proportional to 1,218,288.38, 1,681,257.78 and 666,994.82 is: 920,463.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,288.38 : 1,681,257.78 = 666,994.82 : x
  2. Step 2: Convert to fraction form
    1,218,288.38/1,681,257.78 = 666,994.82/x
  3. Step 3: Cross multiply
    1,218,288.38x = 1,681,257.78 × 666,994.82
  4. Step 4: Simplify right side
    1,218,288.38x = 1,121,390,218,603.44
  5. Step 5: Solve for x
    x = 1,121,390,218,603.44/1,218,288.38
  6. Step 6: Final answer
    x = 920,463.69

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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.