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Finding the Fourth Proportional to 485,461.12, 669,743.68 and 294,404.80

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Solution

The fourth proportional to 485,461.12, 669,743.68 and 294,404.80 is: 406,161.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,461.12 : 669,743.68 = 294,404.80 : x
  2. Step 2: Convert to fraction form
    485,461.12/669,743.68 = 294,404.80/x
  3. Step 3: Cross multiply
    485,461.12x = 669,743.68 × 294,404.80
  4. Step 4: Simplify right side
    485,461.12x = 197,175,754,161.66
  5. Step 5: Solve for x
    x = 197,175,754,161.66/485,461.12
  6. Step 6: Final answer
    x = 406,161.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.