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Finding the Fourth Proportional to 424.28, 584.74 and 307.64

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Solution

The fourth proportional to 424.28, 584.74 and 307.64 is: 423.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.28 : 584.74 = 307.64 : x
  2. Step 2: Convert to fraction form
    424.28/584.74 = 307.64/x
  3. Step 3: Cross multiply
    424.28x = 584.74 × 307.64
  4. Step 4: Simplify right side
    424.28x = 179,889.41
  5. Step 5: Solve for x
    x = 179,889.41/424.28
  6. Step 6: Final answer
    x = 423.99

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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.