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Finding the Fourth Proportional to 288.95, 432.50 and 151.80

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Solution

The fourth proportional to 288.95, 432.50 and 151.80 is: 227.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.95 : 432.50 = 151.80 : x
  2. Step 2: Convert to fraction form
    288.95/432.50 = 151.80/x
  3. Step 3: Cross multiply
    288.95x = 432.50 × 151.80
  4. Step 4: Simplify right side
    288.95x = 65,652.74
  5. Step 5: Solve for x
    x = 65,652.74/288.95
  6. Step 6: Final answer
    x = 227.22

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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.