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Finding the Fourth Proportional to 655,578.79, 983,520.30 and 206,287.97

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Solution

The fourth proportional to 655,578.79, 983,520.30 and 206,287.97 is: 309,479.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,578.79 : 983,520.30 = 206,287.97 : x
  2. Step 2: Convert to fraction form
    655,578.79/983,520.30 = 206,287.97/x
  3. Step 3: Cross multiply
    655,578.79x = 983,520.30 × 206,287.97
  4. Step 4: Simplify right side
    655,578.79x = 202,888,406,140.79
  5. Step 5: Solve for x
    x = 202,888,406,140.79/655,578.79
  6. Step 6: Final answer
    x = 309,479.82

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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.