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Finding the Fourth Proportional to 7,278.80, 10,918.20 and 2,348.60

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Solution

The fourth proportional to 7,278.80, 10,918.20 and 2,348.60 is: 3,522.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,278.80 : 10,918.20 = 2,348.60 : x
  2. Step 2: Convert to fraction form
    7,278.80/10,918.20 = 2,348.60/x
  3. Step 3: Cross multiply
    7,278.80x = 10,918.20 × 2,348.60
  4. Step 4: Simplify right side
    7,278.80x = 25,642,484.52
  5. Step 5: Solve for x
    x = 25,642,484.52/7,278.80
  6. Step 6: Final answer
    x = 3,522.90

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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.