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Finding the Fourth Proportional to 546,980.40, 820,081.80 and 209,890.80

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Solution

The fourth proportional to 546,980.40, 820,081.80 and 209,890.80 is: 314,687.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    546,980.40 : 820,081.80 = 209,890.80 : x
  2. Step 2: Convert to fraction form
    546,980.40/820,081.80 = 209,890.80/x
  3. Step 3: Cross multiply
    546,980.40x = 820,081.80 × 209,890.80
  4. Step 4: Simplify right side
    546,980.40x = 172,127,625,067.44
  5. Step 5: Solve for x
    x = 172,127,625,067.44/546,980.40
  6. Step 6: Final answer
    x = 314,687.01

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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.