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Finding the Fourth Proportional to 1,243.40, 1,864.65 and 377.42

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Solution

The fourth proportional to 1,243.40, 1,864.65 and 377.42 is: 565.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.40 : 1,864.65 = 377.42 : x
  2. Step 2: Convert to fraction form
    1,243.40/1,864.65 = 377.42/x
  3. Step 3: Cross multiply
    1,243.40x = 1,864.65 × 377.42
  4. Step 4: Simplify right side
    1,243.40x = 703,756.20
  5. Step 5: Solve for x
    x = 703,756.20/1,243.40
  6. Step 6: Final answer
    x = 565.99

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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.