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Finding the Fourth Proportional to 1,002.50, 1,503.76 and 309.17

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Solution

The fourth proportional to 1,002.50, 1,503.76 and 309.17 is: 463.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,002.50 : 1,503.76 = 309.17 : x
  2. Step 2: Convert to fraction form
    1,002.50/1,503.76 = 309.17/x
  3. Step 3: Cross multiply
    1,002.50x = 1,503.76 × 309.17
  4. Step 4: Simplify right side
    1,002.50x = 464,911.12
  5. Step 5: Solve for x
    x = 464,911.12/1,002.50
  6. Step 6: Final answer
    x = 463.75

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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.