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Finding the Fourth Proportional to 368.56, 508.17 and 312.44

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Solution

The fourth proportional to 368.56, 508.17 and 312.44 is: 430.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.56 : 508.17 = 312.44 : x
  2. Step 2: Convert to fraction form
    368.56/508.17 = 312.44/x
  3. Step 3: Cross multiply
    368.56x = 508.17 × 312.44
  4. Step 4: Simplify right side
    368.56x = 158,776.27
  5. Step 5: Solve for x
    x = 158,776.27/368.56
  6. Step 6: Final answer
    x = 430.80

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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.