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Finding the Fourth Proportional to 2,678.34, 4,017.20 and 730.38

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Solution

The fourth proportional to 2,678.34, 4,017.20 and 730.38 is: 1,095.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,678.34 : 4,017.20 = 730.38 : x
  2. Step 2: Convert to fraction form
    2,678.34/4,017.20 = 730.38/x
  3. Step 3: Cross multiply
    2,678.34x = 4,017.20 × 730.38
  4. Step 4: Simplify right side
    2,678.34x = 2,934,082.54
  5. Step 5: Solve for x
    x = 2,934,082.54/2,678.34
  6. Step 6: Final answer
    x = 1,095.49

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1.5x scale

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.