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Finding the Fourth Proportional to 1,071.78, 1,607.92 and 341.30

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Solution

The fourth proportional to 1,071.78, 1,607.92 and 341.30 is: 512.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,071.78 : 1,607.92 = 341.30 : x
  2. Step 2: Convert to fraction form
    1,071.78/1,607.92 = 341.30/x
  3. Step 3: Cross multiply
    1,071.78x = 1,607.92 × 341.30
  4. Step 4: Simplify right side
    1,071.78x = 548,783.10
  5. Step 5: Solve for x
    x = 548,783.10/1,071.78
  6. Step 6: Final answer
    x = 512.03

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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.