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Finding the Fourth Proportional to 288.39, 432.59 and 265.71

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Solution

The fourth proportional to 288.39, 432.59 and 265.71 is: 398.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.39 : 432.59 = 265.71 : x
  2. Step 2: Convert to fraction form
    288.39/432.59 = 265.71/x
  3. Step 3: Cross multiply
    288.39x = 432.59 × 265.71
  4. Step 4: Simplify right side
    288.39x = 114,942.16
  5. Step 5: Solve for x
    x = 114,942.16/288.39
  6. Step 6: Final answer
    x = 398.57

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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.