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Finding the Fourth Proportional to 338.10, 507.36 and 143.10

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Solution

The fourth proportional to 338.10, 507.36 and 143.10 is: 214.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.10 : 507.36 = 143.10 : x
  2. Step 2: Convert to fraction form
    338.10/507.36 = 143.10/x
  3. Step 3: Cross multiply
    338.10x = 507.36 × 143.10
  4. Step 4: Simplify right side
    338.10x = 72,603.22
  5. Step 5: Solve for x
    x = 72,603.22/338.10
  6. Step 6: Final answer
    x = 214.74

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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.