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Finding the Fourth Proportional to 368.46, 551.40 and 310.74

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Solution

The fourth proportional to 368.46, 551.40 and 310.74 is: 465.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.46 : 551.40 = 310.74 : x
  2. Step 2: Convert to fraction form
    368.46/551.40 = 310.74/x
  3. Step 3: Cross multiply
    368.46x = 551.40 × 310.74
  4. Step 4: Simplify right side
    368.46x = 171,342.04
  5. Step 5: Solve for x
    x = 171,342.04/368.46
  6. Step 6: Final answer
    x = 465.02

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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.