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Finding the Fourth Proportional to 1,992,835.78, 2,988,668.58 and 912,736.96

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Solution

The fourth proportional to 1,992,835.78, 2,988,668.58 and 912,736.96 is: 1,368,837.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992,835.78 : 2,988,668.58 = 912,736.96 : x
  2. Step 2: Convert to fraction form
    1,992,835.78/2,988,668.58 = 912,736.96/x
  3. Step 3: Cross multiply
    1,992,835.78x = 2,988,668.58 × 912,736.96
  4. Step 4: Simplify right side
    1,992,835.78x = 2,727,868,274,156.72
  5. Step 5: Solve for x
    x = 2,727,868,274,156.72/1,992,835.78
  6. Step 6: Final answer
    x = 1,368,837.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.