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Finding the Fourth Proportional to 368.90, 509.10 and 203.12

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Solution

The fourth proportional to 368.90, 509.10 and 203.12 is: 280.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.90 : 509.10 = 203.12 : x
  2. Step 2: Convert to fraction form
    368.90/509.10 = 203.12/x
  3. Step 3: Cross multiply
    368.90x = 509.10 × 203.12
  4. Step 4: Simplify right side
    368.90x = 103,408.39
  5. Step 5: Solve for x
    x = 103,408.39/368.90
  6. Step 6: Final answer
    x = 280.32

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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.