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Finding the Fourth Proportional to 620,660.46, 930,965.40 and 215,945.31

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Solution

The fourth proportional to 620,660.46, 930,965.40 and 215,945.31 is: 323,909.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,660.46 : 930,965.40 = 215,945.31 : x
  2. Step 2: Convert to fraction form
    620,660.46/930,965.40 = 215,945.31/x
  3. Step 3: Cross multiply
    620,660.46x = 930,965.40 × 215,945.31
  4. Step 4: Simplify right side
    620,660.46x = 201,037,611,902.27
  5. Step 5: Solve for x
    x = 201,037,611,902.27/620,660.46
  6. Step 6: Final answer
    x = 323,909.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.