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Finding the Fourth Proportional to 620,902.27, 856,875.65 and 379,145.82

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Solution

The fourth proportional to 620,902.27, 856,875.65 and 379,145.82 is: 523,239.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,902.27 : 856,875.65 = 379,145.82 : x
  2. Step 2: Convert to fraction form
    620,902.27/856,875.65 = 379,145.82/x
  3. Step 3: Cross multiply
    620,902.27x = 856,875.65 × 379,145.82
  4. Step 4: Simplify right side
    620,902.27x = 324,880,820,957.28
  5. Step 5: Solve for x
    x = 324,880,820,957.28/620,902.27
  6. Step 6: Final answer
    x = 523,239.87

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1.5x scale

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.