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Finding the Fourth Proportional to 500.75, 691.04 and 301.50

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Solution

The fourth proportional to 500.75, 691.04 and 301.50 is: 416.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.75 : 691.04 = 301.50 : x
  2. Step 2: Convert to fraction form
    500.75/691.04 = 301.50/x
  3. Step 3: Cross multiply
    500.75x = 691.04 × 301.50
  4. Step 4: Simplify right side
    500.75x = 208,347.05
  5. Step 5: Solve for x
    x = 208,347.05/500.75
  6. Step 6: Final answer
    x = 416.07

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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.