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Finding the Fourth Proportional to 307.47, 424.16 and 214.30

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Solution

The fourth proportional to 307.47, 424.16 and 214.30 is: 295.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.47 : 424.16 = 214.30 : x
  2. Step 2: Convert to fraction form
    307.47/424.16 = 214.30/x
  3. Step 3: Cross multiply
    307.47x = 424.16 × 214.30
  4. Step 4: Simplify right side
    307.47x = 90,895.36
  5. Step 5: Solve for x
    x = 90,895.36/307.47
  6. Step 6: Final answer
    x = 295.62

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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.