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Finding the Fourth Proportional to 2,839.34, 4,259.02 and 990.45

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Solution

The fourth proportional to 2,839.34, 4,259.02 and 990.45 is: 1,485.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,839.34 : 4,259.02 = 990.45 : x
  2. Step 2: Convert to fraction form
    2,839.34/4,259.02 = 990.45/x
  3. Step 3: Cross multiply
    2,839.34x = 4,259.02 × 990.45
  4. Step 4: Simplify right side
    2,839.34x = 4,218,325.06
  5. Step 5: Solve for x
    x = 4,218,325.06/2,839.34
  6. Step 6: Final answer
    x = 1,485.67

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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.