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Finding the Fourth Proportional to 215,340.80, 323,356.80 and 145,529.60

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Solution

The fourth proportional to 215,340.80, 323,356.80 and 145,529.60 is: 218,527.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,340.80 : 323,356.80 = 145,529.60 : x
  2. Step 2: Convert to fraction form
    215,340.80/323,356.80 = 145,529.60/x
  3. Step 3: Cross multiply
    215,340.80x = 323,356.80 × 145,529.60
  4. Step 4: Simplify right side
    215,340.80x = 47,057,985,761.28
  5. Step 5: Solve for x
    x = 47,057,985,761.28/215,340.80
  6. Step 6: Final answer
    x = 218,527.96

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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.