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Finding the Fourth Proportional to 490,618.70, 735,381.30 and 190,999.70

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Solution

The fourth proportional to 490,618.70, 735,381.30 and 190,999.70 is: 286,286.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,618.70 : 735,381.30 = 190,999.70 : x
  2. Step 2: Convert to fraction form
    490,618.70/735,381.30 = 190,999.70/x
  3. Step 3: Cross multiply
    490,618.70x = 735,381.30 × 190,999.70
  4. Step 4: Simplify right side
    490,618.70x = 140,457,607,685.61
  5. Step 5: Solve for x
    x = 140,457,607,685.61/490,618.70
  6. Step 6: Final answer
    x = 286,286.70

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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.