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Finding the Fourth Proportional to 620,943.80, 856,825.67 and 359,343.97

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Solution

The fourth proportional to 620,943.80, 856,825.67 and 359,343.97 is: 495,850.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,943.80 : 856,825.67 = 359,343.97 : x
  2. Step 2: Convert to fraction form
    620,943.80/856,825.67 = 359,343.97/x
  3. Step 3: Cross multiply
    620,943.80x = 856,825.67 × 359,343.97
  4. Step 4: Simplify right side
    620,943.80x = 307,895,137,855.71
  5. Step 5: Solve for x
    x = 307,895,137,855.71/620,943.80
  6. Step 6: Final answer
    x = 495,850.25

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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.