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Finding the Fourth Proportional to 620,368.12, 856,086.42 and 379,054.60

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Solution

The fourth proportional to 620,368.12, 856,086.42 and 379,054.60 is: 523,082.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,368.12 : 856,086.42 = 379,054.60 : x
  2. Step 2: Convert to fraction form
    620,368.12/856,086.42 = 379,054.60/x
  3. Step 3: Cross multiply
    620,368.12x = 856,086.42 × 379,054.60
  4. Step 4: Simplify right side
    620,368.12x = 324,503,495,498.53
  5. Step 5: Solve for x
    x = 324,503,495,498.53/620,368.12
  6. Step 6: Final answer
    x = 523,082.16

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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.