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Finding the Fourth Proportional to 620,942.80, 856,824.29 and 359,342.97

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Solution

The fourth proportional to 620,942.80, 856,824.29 and 359,342.97 is: 495,848.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,942.80 : 856,824.29 = 359,342.97 : x
  2. Step 2: Convert to fraction form
    620,942.80/856,824.29 = 359,342.97/x
  3. Step 3: Cross multiply
    620,942.80x = 856,824.29 × 359,342.97
  4. Step 4: Simplify right side
    620,942.80x = 307,893,785,136.74
  5. Step 5: Solve for x
    x = 307,893,785,136.74/620,942.80
  6. Step 6: Final answer
    x = 495,848.87

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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.