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Finding the Fourth Proportional to 547,779.62, 755,866.41 and 321,342.50

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Solution

The fourth proportional to 547,779.62, 755,866.41 and 321,342.50 is: 443,411.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,779.62 : 755,866.41 = 321,342.50 : x
  2. Step 2: Convert to fraction form
    547,779.62/755,866.41 = 321,342.50/x
  3. Step 3: Cross multiply
    547,779.62x = 755,866.41 × 321,342.50
  4. Step 4: Simplify right side
    547,779.62x = 242,892,001,855.43
  5. Step 5: Solve for x
    x = 242,892,001,855.43/547,779.62
  6. Step 6: Final answer
    x = 443,411.90

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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.