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Finding the Fourth Proportional to 1,029.85, 1,544.70 and 380.53

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Solution

The fourth proportional to 1,029.85, 1,544.70 and 380.53 is: 570.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,029.85 : 1,544.70 = 380.53 : x
  2. Step 2: Convert to fraction form
    1,029.85/1,544.70 = 380.53/x
  3. Step 3: Cross multiply
    1,029.85x = 1,544.70 × 380.53
  4. Step 4: Simplify right side
    1,029.85x = 587,808.05
  5. Step 5: Solve for x
    x = 587,808.05/1,029.85
  6. Step 6: Final answer
    x = 570.77

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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.