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Finding the Fourth Proportional to 307.48, 424.30 and 176.49

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Solution

The fourth proportional to 307.48, 424.30 and 176.49 is: 243.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.48 : 424.30 = 176.49 : x
  2. Step 2: Convert to fraction form
    307.48/424.30 = 176.49/x
  3. Step 3: Cross multiply
    307.48x = 424.30 × 176.49
  4. Step 4: Simplify right side
    307.48x = 74,884.71
  5. Step 5: Solve for x
    x = 74,884.71/307.48
  6. Step 6: Final answer
    x = 243.54

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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.