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Finding the Fourth Proportional to 1,068.57, 1,602.86 and 338.49

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Solution

The fourth proportional to 1,068.57, 1,602.86 and 338.49 is: 507.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,068.57 : 1,602.86 = 338.49 : x
  2. Step 2: Convert to fraction form
    1,068.57/1,602.86 = 338.49/x
  3. Step 3: Cross multiply
    1,068.57x = 1,602.86 × 338.49
  4. Step 4: Simplify right side
    1,068.57x = 542,550.39
  5. Step 5: Solve for x
    x = 542,550.39/1,068.57
  6. Step 6: Final answer
    x = 507.74

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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.