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Finding the Fourth Proportional to 393.12, 588.56 and 307.36

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Solution

The fourth proportional to 393.12, 588.56 and 307.36 is: 460.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.12 : 588.56 = 307.36 : x
  2. Step 2: Convert to fraction form
    393.12/588.56 = 307.36/x
  3. Step 3: Cross multiply
    393.12x = 588.56 × 307.36
  4. Step 4: Simplify right side
    393.12x = 180,899.80
  5. Step 5: Solve for x
    x = 180,899.80/393.12
  6. Step 6: Final answer
    x = 460.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.