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Finding the Fourth Proportional to 1,341.75, 2,012.89 and 520.03

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Solution

The fourth proportional to 1,341.75, 2,012.89 and 520.03 is: 780.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,341.75 : 2,012.89 = 520.03 : x
  2. Step 2: Convert to fraction form
    1,341.75/2,012.89 = 520.03/x
  3. Step 3: Cross multiply
    1,341.75x = 2,012.89 × 520.03
  4. Step 4: Simplify right side
    1,341.75x = 1,046,763.19
  5. Step 5: Solve for x
    x = 1,046,763.19/1,341.75
  6. Step 6: Final answer
    x = 780.15

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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.