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Finding the Fourth Proportional to 490,084.30, 687,517.70 and 490,084.30

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Solution

The fourth proportional to 490,084.30, 687,517.70 and 490,084.30 is: 687,517.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,084.30 : 687,517.70 = 490,084.30 : x
  2. Step 2: Convert to fraction form
    490,084.30/687,517.70 = 490,084.30/x
  3. Step 3: Cross multiply
    490,084.30x = 687,517.70 × 490,084.30
  4. Step 4: Simplify right side
    490,084.30x = 336,941,630,742.11
  5. Step 5: Solve for x
    x = 336,941,630,742.11/490,084.30
  6. Step 6: Final answer
    x = 687,517.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.