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Finding the Fourth Proportional to 543,814.60, 815,721.90 and 417,697.60

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Solution

The fourth proportional to 543,814.60, 815,721.90 and 417,697.60 is: 626,546.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,814.60 : 815,721.90 = 417,697.60 : x
  2. Step 2: Convert to fraction form
    543,814.60/815,721.90 = 417,697.60/x
  3. Step 3: Cross multiply
    543,814.60x = 815,721.90 × 417,697.60
  4. Step 4: Simplify right side
    543,814.60x = 340,725,079,897.44
  5. Step 5: Solve for x
    x = 340,725,079,897.44/543,814.60
  6. Step 6: Final answer
    x = 626,546.40

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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.