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Finding the Fourth Proportional to 7,280.38, 10,920.56 and 1,808.38

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Solution

The fourth proportional to 7,280.38, 10,920.56 and 1,808.38 is: 2,712.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,280.38 : 10,920.56 = 1,808.38 : x
  2. Step 2: Convert to fraction form
    7,280.38/10,920.56 = 1,808.38/x
  3. Step 3: Cross multiply
    7,280.38x = 10,920.56 × 1,808.38
  4. Step 4: Simplify right side
    7,280.38x = 19,748,522.29
  5. Step 5: Solve for x
    x = 19,748,522.29/7,280.38
  6. Step 6: Final answer
    x = 2,712.57

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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.