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Finding the Fourth Proportional to 1,431,751.71, 1,975,766.81 and 787,166.98

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Solution

The fourth proportional to 1,431,751.71, 1,975,766.81 and 787,166.98 is: 1,086,262.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431,751.71 : 1,975,766.81 = 787,166.98 : x
  2. Step 2: Convert to fraction form
    1,431,751.71/1,975,766.81 = 787,166.98/x
  3. Step 3: Cross multiply
    1,431,751.71x = 1,975,766.81 × 787,166.98
  4. Step 4: Simplify right side
    1,431,751.71x = 1,555,258,383,133.10
  5. Step 5: Solve for x
    x = 1,555,258,383,133.10/1,431,751.71
  6. Step 6: Final answer
    x = 1,086,262.63

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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.