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Finding the Fourth Proportional to 611,498.60, 917,204.70 and 212,042.60

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Solution

The fourth proportional to 611,498.60, 917,204.70 and 212,042.60 is: 318,048.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,498.60 : 917,204.70 = 212,042.60 : x
  2. Step 2: Convert to fraction form
    611,498.60/917,204.70 = 212,042.60/x
  3. Step 3: Cross multiply
    611,498.60x = 917,204.70 × 212,042.60
  4. Step 4: Simplify right side
    611,498.60x = 194,486,469,320.22
  5. Step 5: Solve for x
    x = 194,486,469,320.22/611,498.60
  6. Step 6: Final answer
    x = 318,048.92

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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.