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Finding the Fourth Proportional to 1,401.71, 2,102.25 and 414.32

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Solution

The fourth proportional to 1,401.71, 2,102.25 and 414.32 is: 621.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,401.71 : 2,102.25 = 414.32 : x
  2. Step 2: Convert to fraction form
    1,401.71/2,102.25 = 414.32/x
  3. Step 3: Cross multiply
    1,401.71x = 2,102.25 × 414.32
  4. Step 4: Simplify right side
    1,401.71x = 870,991.64
  5. Step 5: Solve for x
    x = 870,991.64/1,401.71
  6. Step 6: Final answer
    x = 621.38

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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.