Home / 2,989.02-4,125.44-1,980.76

Finding the Fourth Proportional to 2,989.02, 4,125.44 and 1,980.76

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Solution

The fourth proportional to 2,989.02, 4,125.44 and 1,980.76 is: 2,733.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.02 : 4,125.44 = 1,980.76 : x
  2. Step 2: Convert to fraction form
    2,989.02/4,125.44 = 1,980.76/x
  3. Step 3: Cross multiply
    2,989.02x = 4,125.44 × 1,980.76
  4. Step 4: Simplify right side
    2,989.02x = 8,171,506.53
  5. Step 5: Solve for x
    x = 8,171,506.53/2,989.02
  6. Step 6: Final answer
    x = 2,733.84

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.