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Finding the Fourth Proportional to 1,160.40, 1,740.96 and 338.70

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Solution

The fourth proportional to 1,160.40, 1,740.96 and 338.70 is: 508.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,160.40 : 1,740.96 = 338.70 : x
  2. Step 2: Convert to fraction form
    1,160.40/1,740.96 = 338.70/x
  3. Step 3: Cross multiply
    1,160.40x = 1,740.96 × 338.70
  4. Step 4: Simplify right side
    1,160.40x = 589,663.15
  5. Step 5: Solve for x
    x = 589,663.15/1,160.40
  6. Step 6: Final answer
    x = 508.16

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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.