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Finding the Fourth Proportional to 310.08, 424.32 and 303.36

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Solution

The fourth proportional to 310.08, 424.32 and 303.36 is: 415.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.08 : 424.32 = 303.36 : x
  2. Step 2: Convert to fraction form
    310.08/424.32 = 303.36/x
  3. Step 3: Cross multiply
    310.08x = 424.32 × 303.36
  4. Step 4: Simplify right side
    310.08x = 128,721.72
  5. Step 5: Solve for x
    x = 128,721.72/310.08
  6. Step 6: Final answer
    x = 415.12

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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.