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Finding the Fourth Proportional to 291.07, 434.33 and 265.19

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Solution

The fourth proportional to 291.07, 434.33 and 265.19 is: 395.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.07 : 434.33 = 265.19 : x
  2. Step 2: Convert to fraction form
    291.07/434.33 = 265.19/x
  3. Step 3: Cross multiply
    291.07x = 434.33 × 265.19
  4. Step 4: Simplify right side
    291.07x = 115,181.72
  5. Step 5: Solve for x
    x = 115,181.72/291.07
  6. Step 6: Final answer
    x = 395.72

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.