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Finding the Fourth Proportional to 490,621.70, 735,385.80 and 191,002.70

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Solution

The fourth proportional to 490,621.70, 735,385.80 and 191,002.70 is: 286,291.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,621.70 : 735,385.80 = 191,002.70 : x
  2. Step 2: Convert to fraction form
    490,621.70/735,385.80 = 191,002.70/x
  3. Step 3: Cross multiply
    490,621.70x = 735,385.80 × 191,002.70
  4. Step 4: Simplify right side
    490,621.70x = 140,460,673,341.66
  5. Step 5: Solve for x
    x = 140,460,673,341.66/490,621.70
  6. Step 6: Final answer
    x = 286,291.20

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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.