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Finding the Fourth Proportional to 386.28, 532.60 and 307.35

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Solution

The fourth proportional to 386.28, 532.60 and 307.35 is: 423.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.28 : 532.60 = 307.35 : x
  2. Step 2: Convert to fraction form
    386.28/532.60 = 307.35/x
  3. Step 3: Cross multiply
    386.28x = 532.60 × 307.35
  4. Step 4: Simplify right side
    386.28x = 163,694.12
  5. Step 5: Solve for x
    x = 163,694.12/386.28
  6. Step 6: Final answer
    x = 423.77

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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.