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Finding the Fourth Proportional to 302.50, 453.75 and 131.50

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Solution

The fourth proportional to 302.50, 453.75 and 131.50 is: 197.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.50 : 453.75 = 131.50 : x
  2. Step 2: Convert to fraction form
    302.50/453.75 = 131.50/x
  3. Step 3: Cross multiply
    302.50x = 453.75 × 131.50
  4. Step 4: Simplify right side
    302.50x = 59,668.13
  5. Step 5: Solve for x
    x = 59,668.13/302.50
  6. Step 6: Final answer
    x = 197.25

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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.