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Finding the Fourth Proportional to 543,609.40, 812,789.70 and 401,891.80

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Solution

The fourth proportional to 543,609.40, 812,789.70 and 401,891.80 is: 600,897.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,609.40 : 812,789.70 = 401,891.80 : x
  2. Step 2: Convert to fraction form
    543,609.40/812,789.70 = 401,891.80/x
  3. Step 3: Cross multiply
    543,609.40x = 812,789.70 × 401,891.80
  4. Step 4: Simplify right side
    543,609.40x = 326,653,515,554.46
  5. Step 5: Solve for x
    x = 326,653,515,554.46/543,609.40
  6. Step 6: Final answer
    x = 600,897.47

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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.