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Finding the Fourth Proportional to 1,068.70, 1,603.06 and 338.34

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Solution

The fourth proportional to 1,068.70, 1,603.06 and 338.34 is: 507.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,068.70 : 1,603.06 = 338.34 : x
  2. Step 2: Convert to fraction form
    1,068.70/1,603.06 = 338.34/x
  3. Step 3: Cross multiply
    1,068.70x = 1,603.06 × 338.34
  4. Step 4: Simplify right side
    1,068.70x = 542,379.32
  5. Step 5: Solve for x
    x = 542,379.32/1,068.70
  6. Step 6: Final answer
    x = 507.51

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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.