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Finding the Fourth Proportional to 1,335.69, 2,003.54 and 513.95

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Solution

The fourth proportional to 1,335.69, 2,003.54 and 513.95 is: 770.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.69 : 2,003.54 = 513.95 : x
  2. Step 2: Convert to fraction form
    1,335.69/2,003.54 = 513.95/x
  3. Step 3: Cross multiply
    1,335.69x = 2,003.54 × 513.95
  4. Step 4: Simplify right side
    1,335.69x = 1,029,706.80
  5. Step 5: Solve for x
    x = 1,029,706.80/1,335.69
  6. Step 6: Final answer
    x = 770.92

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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.