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Finding the Fourth Proportional to 307.43, 424.25 and 202.70

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Solution

The fourth proportional to 307.43, 424.25 and 202.70 is: 279.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.43 : 424.25 = 202.70 : x
  2. Step 2: Convert to fraction form
    307.43/424.25 = 202.70/x
  3. Step 3: Cross multiply
    307.43x = 424.25 × 202.70
  4. Step 4: Simplify right side
    307.43x = 85,994.52
  5. Step 5: Solve for x
    x = 85,994.52/307.43
  6. Step 6: Final answer
    x = 279.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.