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Finding the Fourth Proportional to 1,432,473.72, 1,976,814.75 and 787,942.95

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Solution

The fourth proportional to 1,432,473.72, 1,976,814.75 and 787,942.95 is: 1,087,361.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432,473.72 : 1,976,814.75 = 787,942.95 : x
  2. Step 2: Convert to fraction form
    1,432,473.72/1,976,814.75 = 787,942.95/x
  3. Step 3: Cross multiply
    1,432,473.72x = 1,976,814.75 × 787,942.95
  4. Step 4: Simplify right side
    1,432,473.72x = 1,557,617,245,718.51
  5. Step 5: Solve for x
    x = 1,557,617,245,718.51/1,432,473.72
  6. Step 6: Final answer
    x = 1,087,361.83

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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.