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Finding the Fourth Proportional to 485,781.45, 670,585.68 and 304,596.60

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Solution

The fourth proportional to 485,781.45, 670,585.68 and 304,596.60 is: 420,473.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,781.45 : 670,585.68 = 304,596.60 : x
  2. Step 2: Convert to fraction form
    485,781.45/670,585.68 = 304,596.60/x
  3. Step 3: Cross multiply
    485,781.45x = 670,585.68 × 304,596.60
  4. Step 4: Simplify right side
    485,781.45x = 204,258,118,136.69
  5. Step 5: Solve for x
    x = 204,258,118,136.69/485,781.45
  6. Step 6: Final answer
    x = 420,473.28

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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.