Home / 1,206,992.40-1,665,660.78-663,139.47

Finding the Fourth Proportional to 1,206,992.40, 1,665,660.78 and 663,139.47

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Solution

The fourth proportional to 1,206,992.40, 1,665,660.78 and 663,139.47 is: 915,138.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206,992.40 : 1,665,660.78 = 663,139.47 : x
  2. Step 2: Convert to fraction form
    1,206,992.40/1,665,660.78 = 663,139.47/x
  3. Step 3: Cross multiply
    1,206,992.40x = 1,665,660.78 × 663,139.47
  4. Step 4: Simplify right side
    1,206,992.40x = 1,104,565,406,848.99
  5. Step 5: Solve for x
    x = 1,104,565,406,848.99/1,206,992.40
  6. Step 6: Final answer
    x = 915,138.66

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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.