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Finding the Fourth Proportional to 1,678.04, 2,516.98 and 799.90

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Solution

The fourth proportional to 1,678.04, 2,516.98 and 799.90 is: 1,199.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.04 : 2,516.98 = 799.90 : x
  2. Step 2: Convert to fraction form
    1,678.04/2,516.98 = 799.90/x
  3. Step 3: Cross multiply
    1,678.04x = 2,516.98 × 799.90
  4. Step 4: Simplify right side
    1,678.04x = 2,013,328.30
  5. Step 5: Solve for x
    x = 2,013,328.30/1,678.04
  6. Step 6: Final answer
    x = 1,199.81

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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.