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Finding the Fourth Proportional to 1,283,421.04, 1,769,836.44 and 853,719.28

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Solution

The fourth proportional to 1,283,421.04, 1,769,836.44 and 853,719.28 is: 1,177,278.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283,421.04 : 1,769,836.44 = 853,719.28 : x
  2. Step 2: Convert to fraction form
    1,283,421.04/1,769,836.44 = 853,719.28/x
  3. Step 3: Cross multiply
    1,283,421.04x = 1,769,836.44 × 853,719.28
  4. Step 4: Simplify right side
    1,283,421.04x = 1,510,943,491,274.56
  5. Step 5: Solve for x
    x = 1,510,943,491,274.56/1,283,421.04
  6. Step 6: Final answer
    x = 1,177,278.11

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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.