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Finding the Fourth Proportional to 307.36, 424.12 and 258.16

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Solution

The fourth proportional to 307.36, 424.12 and 258.16 is: 356.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.36 : 424.12 = 258.16 : x
  2. Step 2: Convert to fraction form
    307.36/424.12 = 258.16/x
  3. Step 3: Cross multiply
    307.36x = 424.12 × 258.16
  4. Step 4: Simplify right side
    307.36x = 109,490.82
  5. Step 5: Solve for x
    x = 109,490.82/307.36
  6. Step 6: Final answer
    x = 356.23

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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.