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Finding the Fourth Proportional to 307.78, 424.71 and 183.46

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Solution

The fourth proportional to 307.78, 424.71 and 183.46 is: 253.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.78 : 424.71 = 183.46 : x
  2. Step 2: Convert to fraction form
    307.78/424.71 = 183.46/x
  3. Step 3: Cross multiply
    307.78x = 424.71 × 183.46
  4. Step 4: Simplify right side
    307.78x = 77,917.30
  5. Step 5: Solve for x
    x = 77,917.30/307.78
  6. Step 6: Final answer
    x = 253.16

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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.