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Finding the Fourth Proportional to 2,719,928.60, 4,079,892.90 and 947,000.60

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Solution

The fourth proportional to 2,719,928.60, 4,079,892.90 and 947,000.60 is: 1,420,500.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,719,928.60 : 4,079,892.90 = 947,000.60 : x
  2. Step 2: Convert to fraction form
    2,719,928.60/4,079,892.90 = 947,000.60/x
  3. Step 3: Cross multiply
    2,719,928.60x = 4,079,892.90 × 947,000.60
  4. Step 4: Simplify right side
    2,719,928.60x = 3,863,661,024,235.74
  5. Step 5: Solve for x
    x = 3,863,661,024,235.74/2,719,928.60
  6. Step 6: Final answer
    x = 1,420,500.90

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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.