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Finding the Fourth Proportional to 450,999.54, 676,721.61 and 211,129.70

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Solution

The fourth proportional to 450,999.54, 676,721.61 and 211,129.70 is: 316,798.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,999.54 : 676,721.61 = 211,129.70 : x
  2. Step 2: Convert to fraction form
    450,999.54/676,721.61 = 211,129.70/x
  3. Step 3: Cross multiply
    450,999.54x = 676,721.61 × 211,129.70
  4. Step 4: Simplify right side
    450,999.54x = 142,876,029,656.92
  5. Step 5: Solve for x
    x = 142,876,029,656.92/450,999.54
  6. Step 6: Final answer
    x = 316,798.62

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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.