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Finding the Fourth Proportional to 288.47, 432.50 and 115.08

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Solution

The fourth proportional to 288.47, 432.50 and 115.08 is: 172.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.47 : 432.50 = 115.08 : x
  2. Step 2: Convert to fraction form
    288.47/432.50 = 115.08/x
  3. Step 3: Cross multiply
    288.47x = 432.50 × 115.08
  4. Step 4: Simplify right side
    288.47x = 49,771.52
  5. Step 5: Solve for x
    x = 49,771.52/288.47
  6. Step 6: Final answer
    x = 172.54

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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.