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Finding the Fourth Proportional to 1,428,434, 1,971,238.68 and 816,600.08

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Solution

The fourth proportional to 1,428,434, 1,971,238.68 and 816,600.08 is: 1,126,907.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,434 : 1,971,238.68 = 816,600.08 : x
  2. Step 2: Convert to fraction form
    1,428,434/1,971,238.68 = 816,600.08/x
  3. Step 3: Cross multiply
    1,428,434x = 1,971,238.68 × 816,600.08
  4. Step 4: Simplify right side
    1,428,434x = 1,609,713,663,787.09
  5. Step 5: Solve for x
    x = 1,609,713,663,787.09/1,428,434
  6. Step 6: Final answer
    x = 1,126,907.97

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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.