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Finding the Fourth Proportional to 490,628.60, 735,942.90 and 420,644.60

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Solution

The fourth proportional to 490,628.60, 735,942.90 and 420,644.60 is: 630,966.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,628.60 : 735,942.90 = 420,644.60 : x
  2. Step 2: Convert to fraction form
    490,628.60/735,942.90 = 420,644.60/x
  3. Step 3: Cross multiply
    490,628.60x = 735,942.90 × 420,644.60
  4. Step 4: Simplify right side
    490,628.60x = 309,570,406,793.34
  5. Step 5: Solve for x
    x = 309,570,406,793.34/490,628.60
  6. Step 6: Final answer
    x = 630,966.90

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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.