Home / 4,781.84-7,172.78-1,319.09

Finding the Fourth Proportional to 4,781.84, 7,172.78 and 1,319.09

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Solution

The fourth proportional to 4,781.84, 7,172.78 and 1,319.09 is: 1,978.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,781.84 : 7,172.78 = 1,319.09 : x
  2. Step 2: Convert to fraction form
    4,781.84/7,172.78 = 1,319.09/x
  3. Step 3: Cross multiply
    4,781.84x = 7,172.78 × 1,319.09
  4. Step 4: Simplify right side
    4,781.84x = 9,461,499.91
  5. Step 5: Solve for x
    x = 9,461,499.91/4,781.84
  6. Step 6: Final answer
    x = 1,978.63

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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.