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Finding the Fourth Proportional to 1,335.99, 2,003.99 and 514.65

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Solution

The fourth proportional to 1,335.99, 2,003.99 and 514.65 is: 771.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.99 : 2,003.99 = 514.65 : x
  2. Step 2: Convert to fraction form
    1,335.99/2,003.99 = 514.65/x
  3. Step 3: Cross multiply
    1,335.99x = 2,003.99 × 514.65
  4. Step 4: Simplify right side
    1,335.99x = 1,031,350.88
  5. Step 5: Solve for x
    x = 1,031,350.88/1,335.99
  6. Step 6: Final answer
    x = 771.98

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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.