Home / 5,220.65-7,830.97-1,325.05

Finding the Fourth Proportional to 5,220.65, 7,830.97 and 1,325.05

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Solution

The fourth proportional to 5,220.65, 7,830.97 and 1,325.05 is: 1,987.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,220.65 : 7,830.97 = 1,325.05 : x
  2. Step 2: Convert to fraction form
    5,220.65/7,830.97 = 1,325.05/x
  3. Step 3: Cross multiply
    5,220.65x = 7,830.97 × 1,325.05
  4. Step 4: Simplify right side
    5,220.65x = 10,376,403.91
  5. Step 5: Solve for x
    x = 10,376,403.91/5,220.65
  6. Step 6: Final answer
    x = 1,987.57

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Double scale
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Similar ratio
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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.