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Finding the Fourth Proportional to 5,284.98, 7,929.57 and 1,998.99

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Solution

The fourth proportional to 5,284.98, 7,929.57 and 1,998.99 is: 2,999.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,284.98 : 7,929.57 = 1,998.99 : x
  2. Step 2: Convert to fraction form
    5,284.98/7,929.57 = 1,998.99/x
  3. Step 3: Cross multiply
    5,284.98x = 7,929.57 × 1,998.99
  4. Step 4: Simplify right side
    5,284.98x = 15,851,131.13
  5. Step 5: Solve for x
    x = 15,851,131.13/5,284.98
  6. Step 6: Final answer
    x = 2,999.28

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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.