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Finding the Fourth Proportional to 1,396,364.76, 1,926,869.40 and 784,484.28

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Solution

The fourth proportional to 1,396,364.76, 1,926,869.40 and 784,484.28 is: 1,082,524.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396,364.76 : 1,926,869.40 = 784,484.28 : x
  2. Step 2: Convert to fraction form
    1,396,364.76/1,926,869.40 = 784,484.28/x
  3. Step 3: Cross multiply
    1,396,364.76x = 1,926,869.40 × 784,484.28
  4. Step 4: Simplify right side
    1,396,364.76x = 1,511,598,753,913.03
  5. Step 5: Solve for x
    x = 1,511,598,753,913.03/1,396,364.76
  6. Step 6: Final answer
    x = 1,082,524.28

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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.