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Finding the Fourth Proportional to 381,779.27, 572,616.60 and 211,316.28

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Solution

The fourth proportional to 381,779.27, 572,616.60 and 211,316.28 is: 316,945.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,779.27 : 572,616.60 = 211,316.28 : x
  2. Step 2: Convert to fraction form
    381,779.27/572,616.60 = 211,316.28/x
  3. Step 3: Cross multiply
    381,779.27x = 572,616.60 × 211,316.28
  4. Step 4: Simplify right side
    381,779.27x = 121,003,209,778.25
  5. Step 5: Solve for x
    x = 121,003,209,778.25/381,779.27
  6. Step 6: Final answer
    x = 316,945.47

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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.