Home / 5,175.84-7,763.76-1,280.20

Finding the Fourth Proportional to 5,175.84, 7,763.76 and 1,280.20

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Solution

The fourth proportional to 5,175.84, 7,763.76 and 1,280.20 is: 1,920.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,175.84 : 7,763.76 = 1,280.20 : x
  2. Step 2: Convert to fraction form
    5,175.84/7,763.76 = 1,280.20/x
  3. Step 3: Cross multiply
    5,175.84x = 7,763.76 × 1,280.20
  4. Step 4: Simplify right side
    5,175.84x = 9,939,165.55
  5. Step 5: Solve for x
    x = 9,939,165.55/5,175.84
  6. Step 6: Final answer
    x = 1,920.30

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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.