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Finding the Fourth Proportional to 368.22, 508.36 and 285.18

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Solution

The fourth proportional to 368.22, 508.36 and 285.18 is: 393.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.22 : 508.36 = 285.18 : x
  2. Step 2: Convert to fraction form
    368.22/508.36 = 285.18/x
  3. Step 3: Cross multiply
    368.22x = 508.36 × 285.18
  4. Step 4: Simplify right side
    368.22x = 144,974.10
  5. Step 5: Solve for x
    x = 144,974.10/368.22
  6. Step 6: Final answer
    x = 393.72

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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.