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Finding the Fourth Proportional to 1,068.09, 1,602.15 and 338.18

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Solution

The fourth proportional to 1,068.09, 1,602.15 and 338.18 is: 507.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,068.09 : 1,602.15 = 338.18 : x
  2. Step 2: Convert to fraction form
    1,068.09/1,602.15 = 338.18/x
  3. Step 3: Cross multiply
    1,068.09x = 1,602.15 × 338.18
  4. Step 4: Simplify right side
    1,068.09x = 541,805.81
  5. Step 5: Solve for x
    x = 541,805.81/1,068.09
  6. Step 6: Final answer
    x = 507.27

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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.