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Finding the Fourth Proportional to 621,808.80, 858,086.76 and 349,877.04

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Solution

The fourth proportional to 621,808.80, 858,086.76 and 349,877.04 is: 482,825.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,808.80 : 858,086.76 = 349,877.04 : x
  2. Step 2: Convert to fraction form
    621,808.80/858,086.76 = 349,877.04/x
  3. Step 3: Cross multiply
    621,808.80x = 858,086.76 × 349,877.04
  4. Step 4: Simplify right side
    621,808.80x = 300,224,855,651.99
  5. Step 5: Solve for x
    x = 300,224,855,651.99/621,808.80
  6. Step 6: Final answer
    x = 482,825.04

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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.