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Finding the Fourth Proportional to 490,665.90, 735,998.85 and 486,000.30

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Solution

The fourth proportional to 490,665.90, 735,998.85 and 486,000.30 is: 729,000.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,665.90 : 735,998.85 = 486,000.30 : x
  2. Step 2: Convert to fraction form
    490,665.90/735,998.85 = 486,000.30/x
  3. Step 3: Cross multiply
    490,665.90x = 735,998.85 × 486,000.30
  4. Step 4: Simplify right side
    490,665.90x = 357,695,661,899.66
  5. Step 5: Solve for x
    x = 357,695,661,899.66/490,665.90
  6. Step 6: Final answer
    x = 729,000.45

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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.