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Finding the Fourth Proportional to 268,779.20, 402,823.20 and 206,139.20

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Solution

The fourth proportional to 268,779.20, 402,823.20 and 206,139.20 is: 308,943.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,779.20 : 402,823.20 = 206,139.20 : x
  2. Step 2: Convert to fraction form
    268,779.20/402,823.20 = 206,139.20/x
  3. Step 3: Cross multiply
    268,779.20x = 402,823.20 × 206,139.20
  4. Step 4: Simplify right side
    268,779.20x = 83,037,652,189.44
  5. Step 5: Solve for x
    x = 83,037,652,189.44/268,779.20
  6. Step 6: Final answer
    x = 308,943.74

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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.