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Finding the Fourth Proportional to 1,401.90, 2,098.38 and 783.71

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Solution

The fourth proportional to 1,401.90, 2,098.38 and 783.71 is: 1,173.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,401.90 : 2,098.38 = 783.71 : x
  2. Step 2: Convert to fraction form
    1,401.90/2,098.38 = 783.71/x
  3. Step 3: Cross multiply
    1,401.90x = 2,098.38 × 783.71
  4. Step 4: Simplify right side
    1,401.90x = 1,644,521.39
  5. Step 5: Solve for x
    x = 1,644,521.39/1,401.90
  6. Step 6: Final answer
    x = 1,173.07

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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.