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Finding the Fourth Proportional to 620,368.62, 856,087.11 and 379,055.10

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Solution

The fourth proportional to 620,368.62, 856,087.11 and 379,055.10 is: 523,082.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,368.62 : 856,087.11 = 379,055.10 : x
  2. Step 2: Convert to fraction form
    620,368.62/856,087.11 = 379,055.10/x
  3. Step 3: Cross multiply
    620,368.62x = 856,087.11 × 379,055.10
  4. Step 4: Simplify right side
    620,368.62x = 324,504,185,089.76
  5. Step 5: Solve for x
    x = 324,504,185,089.76/620,368.62
  6. Step 6: Final answer
    x = 523,082.85

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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.