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Finding the Fourth Proportional to 1,368,709.28, 1,888,741.92 and 756,826.40

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Solution

The fourth proportional to 1,368,709.28, 1,888,741.92 and 756,826.40 is: 1,044,377.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368,709.28 : 1,888,741.92 = 756,826.40 : x
  2. Step 2: Convert to fraction form
    1,368,709.28/1,888,741.92 = 756,826.40/x
  3. Step 3: Cross multiply
    1,368,709.28x = 1,888,741.92 × 756,826.40
  4. Step 4: Simplify right side
    1,368,709.28x = 1,429,449,747,842.69
  5. Step 5: Solve for x
    x = 1,429,449,747,842.69/1,368,709.28
  6. Step 6: Final answer
    x = 1,044,377.92

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.