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Finding the Fourth Proportional to 309, 424.19 and 265.26

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Solution

The fourth proportional to 309, 424.19 and 265.26 is: 364.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    309 : 424.19 = 265.26 : x
  2. Step 2: Convert to fraction form
    309/424.19 = 265.26/x
  3. Step 3: Cross multiply
    309x = 424.19 × 265.26
  4. Step 4: Simplify right side
    309x = 112,520.64
  5. Step 5: Solve for x
    x = 112,520.64/309
  6. Step 6: Final answer
    x = 364.14

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.