Home / 815,442.69-1,217,672.49-665,979.48

Finding the Fourth Proportional to 815,442.69, 1,217,672.49 and 665,979.48

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Solution

The fourth proportional to 815,442.69, 1,217,672.49 and 665,979.48 is: 994,484.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,442.69 : 1,217,672.49 = 665,979.48 : x
  2. Step 2: Convert to fraction form
    815,442.69/1,217,672.49 = 665,979.48/x
  3. Step 3: Cross multiply
    815,442.69x = 1,217,672.49 × 665,979.48
  4. Step 4: Simplify right side
    815,442.69x = 810,944,891,700.51
  5. Step 5: Solve for x
    x = 810,944,891,700.51/815,442.69
  6. Step 6: Final answer
    x = 994,484.23

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.