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Finding the Fourth Proportional to 461.88, 691.20 and 358.50

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Solution

The fourth proportional to 461.88, 691.20 and 358.50 is: 536.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.88 : 691.20 = 358.50 : x
  2. Step 2: Convert to fraction form
    461.88/691.20 = 358.50/x
  3. Step 3: Cross multiply
    461.88x = 691.20 × 358.50
  4. Step 4: Simplify right side
    461.88x = 247,797.79
  5. Step 5: Solve for x
    x = 247,797.79/461.88
  6. Step 6: Final answer
    x = 536.50

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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.