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Finding the Fourth Proportional to 1,335.33, 2,002.76 and 513.45

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Solution

The fourth proportional to 1,335.33, 2,002.76 and 513.45 is: 770.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.33 : 2,002.76 = 513.45 : x
  2. Step 2: Convert to fraction form
    1,335.33/2,002.76 = 513.45/x
  3. Step 3: Cross multiply
    1,335.33x = 2,002.76 × 513.45
  4. Step 4: Simplify right side
    1,335.33x = 1,028,314.55
  5. Step 5: Solve for x
    x = 1,028,314.55/1,335.33
  6. Step 6: Final answer
    x = 770.08

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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.