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Finding the Fourth Proportional to 490,519.50, 735,988.38 and 191,210.78

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Solution

The fourth proportional to 490,519.50, 735,988.38 and 191,210.78 is: 286,897.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,519.50 : 735,988.38 = 191,210.78 : x
  2. Step 2: Convert to fraction form
    490,519.50/735,988.38 = 191,210.78/x
  3. Step 3: Cross multiply
    490,519.50x = 735,988.38 × 191,210.78
  4. Step 4: Simplify right side
    490,519.50x = 140,728,909,193.73
  5. Step 5: Solve for x
    x = 140,728,909,193.73/490,519.50
  6. Step 6: Final answer
    x = 286,897.69

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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.