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Finding the Fourth Proportional to 1,787,281.97, 2,679,416.24 and 775,641.90

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Solution

The fourth proportional to 1,787,281.97, 2,679,416.24 and 775,641.90 is: 1,162,808.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787,281.97 : 2,679,416.24 = 775,641.90 : x
  2. Step 2: Convert to fraction form
    1,787,281.97/2,679,416.24 = 775,641.90/x
  3. Step 3: Cross multiply
    1,787,281.97x = 2,679,416.24 × 775,641.90
  4. Step 4: Simplify right side
    1,787,281.97x = 2,078,267,499,406.25
  5. Step 5: Solve for x
    x = 2,078,267,499,406.25/1,787,281.97
  6. Step 6: Final answer
    x = 1,162,808.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.