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Finding the Fourth Proportional to 547,779.10, 821,668.65 and 539,905.90

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Solution

The fourth proportional to 547,779.10, 821,668.65 and 539,905.90 is: 809,858.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,779.10 : 821,668.65 = 539,905.90 : x
  2. Step 2: Convert to fraction form
    547,779.10/821,668.65 = 539,905.90/x
  3. Step 3: Cross multiply
    547,779.10x = 821,668.65 × 539,905.90
  4. Step 4: Simplify right side
    547,779.10x = 443,623,751,980.04
  5. Step 5: Solve for x
    x = 443,623,751,980.04/547,779.10
  6. Step 6: Final answer
    x = 809,858.85

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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.