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Finding the Fourth Proportional to 1,002.99, 1,504.61 and 309.63

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Solution

The fourth proportional to 1,002.99, 1,504.61 and 309.63 is: 464.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,002.99 : 1,504.61 = 309.63 : x
  2. Step 2: Convert to fraction form
    1,002.99/1,504.61 = 309.63/x
  3. Step 3: Cross multiply
    1,002.99x = 1,504.61 × 309.63
  4. Step 4: Simplify right side
    1,002.99x = 465,870.85
  5. Step 5: Solve for x
    x = 465,870.85/1,002.99
  6. Step 6: Final answer
    x = 464.48

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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.