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Finding the Fourth Proportional to 202,385.40, 303,318.90 and 155,405.40

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Solution

The fourth proportional to 202,385.40, 303,318.90 and 155,405.40 is: 232,909.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,385.40 : 303,318.90 = 155,405.40 : x
  2. Step 2: Convert to fraction form
    202,385.40/303,318.90 = 155,405.40/x
  3. Step 3: Cross multiply
    202,385.40x = 303,318.90 × 155,405.40
  4. Step 4: Simplify right side
    202,385.40x = 47,137,394,982.06
  5. Step 5: Solve for x
    x = 47,137,394,982.06/202,385.40
  6. Step 6: Final answer
    x = 232,909.07

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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.