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Finding the Fourth Proportional to 307.66, 424.32 and 261.16

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Solution

The fourth proportional to 307.66, 424.32 and 261.16 is: 360.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.66 : 424.32 = 261.16 : x
  2. Step 2: Convert to fraction form
    307.66/424.32 = 261.16/x
  3. Step 3: Cross multiply
    307.66x = 424.32 × 261.16
  4. Step 4: Simplify right side
    307.66x = 110,815.41
  5. Step 5: Solve for x
    x = 110,815.41/307.66
  6. Step 6: Final answer
    x = 360.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.