Home / 4,990.10-7,485.15-2,649.20

Finding the Fourth Proportional to 4,990.10, 7,485.15 and 2,649.20

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Solution

The fourth proportional to 4,990.10, 7,485.15 and 2,649.20 is: 3,973.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,990.10 : 7,485.15 = 2,649.20 : x
  2. Step 2: Convert to fraction form
    4,990.10/7,485.15 = 2,649.20/x
  3. Step 3: Cross multiply
    4,990.10x = 7,485.15 × 2,649.20
  4. Step 4: Simplify right side
    4,990.10x = 19,829,659.38
  5. Step 5: Solve for x
    x = 19,829,659.38/4,990.10
  6. Step 6: Final answer
    x = 3,973.80

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Half scale
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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.