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Finding the Fourth Proportional to 3,327.02, 4,990.40 and 987.02

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Solution

The fourth proportional to 3,327.02, 4,990.40 and 987.02 is: 1,480.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,327.02 : 4,990.40 = 987.02 : x
  2. Step 2: Convert to fraction form
    3,327.02/4,990.40 = 987.02/x
  3. Step 3: Cross multiply
    3,327.02x = 4,990.40 × 987.02
  4. Step 4: Simplify right side
    3,327.02x = 4,925,624.61
  5. Step 5: Solve for x
    x = 4,925,624.61/3,327.02
  6. Step 6: Final answer
    x = 1,480.49

Related Problems

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Double scale
Find fourth proportional to 3,328.02, 4,991.90 and 988.02
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.