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Finding the Fourth Proportional to 368.76, 551.12 and 339.57

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Solution

The fourth proportional to 368.76, 551.12 and 339.57 is: 507.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.76 : 551.12 = 339.57 : x
  2. Step 2: Convert to fraction form
    368.76/551.12 = 339.57/x
  3. Step 3: Cross multiply
    368.76x = 551.12 × 339.57
  4. Step 4: Simplify right side
    368.76x = 187,143.82
  5. Step 5: Solve for x
    x = 187,143.82/368.76
  6. Step 6: Final answer
    x = 507.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.