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Finding the Fourth Proportional to 368.01, 507.20 and 308.75

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Solution

The fourth proportional to 368.01, 507.20 and 308.75 is: 425.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.01 : 507.20 = 308.75 : x
  2. Step 2: Convert to fraction form
    368.01/507.20 = 308.75/x
  3. Step 3: Cross multiply
    368.01x = 507.20 × 308.75
  4. Step 4: Simplify right side
    368.01x = 156,593.92
  5. Step 5: Solve for x
    x = 156,593.92/368.01
  6. Step 6: Final answer
    x = 425.52

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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.