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Finding the Fourth Proportional to 1,401.38, 1,933.95 and 771.87

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Solution

The fourth proportional to 1,401.38, 1,933.95 and 771.87 is: 1,065.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,401.38 : 1,933.95 = 771.87 : x
  2. Step 2: Convert to fraction form
    1,401.38/1,933.95 = 771.87/x
  3. Step 3: Cross multiply
    1,401.38x = 1,933.95 × 771.87
  4. Step 4: Simplify right side
    1,401.38x = 1,492,757.99
  5. Step 5: Solve for x
    x = 1,492,757.99/1,401.38
  6. Step 6: Final answer
    x = 1,065.21

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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.