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Finding the Fourth Proportional to 407.36, 610.28 and 253.20

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Solution

The fourth proportional to 407.36, 610.28 and 253.20 is: 379.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.36 : 610.28 = 253.20 : x
  2. Step 2: Convert to fraction form
    407.36/610.28 = 253.20/x
  3. Step 3: Cross multiply
    407.36x = 610.28 × 253.20
  4. Step 4: Simplify right side
    407.36x = 154,522.90
  5. Step 5: Solve for x
    x = 154,522.90/407.36
  6. Step 6: Final answer
    x = 379.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.