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Finding the Fourth Proportional to 402,245.20, 603,454.20 and 121,790.80

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Solution

The fourth proportional to 402,245.20, 603,454.20 and 121,790.80 is: 182,712.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,245.20 : 603,454.20 = 121,790.80 : x
  2. Step 2: Convert to fraction form
    402,245.20/603,454.20 = 121,790.80/x
  3. Step 3: Cross multiply
    402,245.20x = 603,454.20 × 121,790.80
  4. Step 4: Simplify right side
    402,245.20x = 73,495,169,781.36
  5. Step 5: Solve for x
    x = 73,495,169,781.36/402,245.20
  6. Step 6: Final answer
    x = 182,712.36

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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.