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Finding the Fourth Proportional to 402,424.20, 603,261 and 135,998.40

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Solution

The fourth proportional to 402,424.20, 603,261 and 135,998.40 is: 203,870.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,424.20 : 603,261 = 135,998.40 : x
  2. Step 2: Convert to fraction form
    402,424.20/603,261 = 135,998.40/x
  3. Step 3: Cross multiply
    402,424.20x = 603,261 × 135,998.40
  4. Step 4: Simplify right side
    402,424.20x = 82,042,530,782.40
  5. Step 5: Solve for x
    x = 82,042,530,782.40/402,424.20
  6. Step 6: Final answer
    x = 203,870.77

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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.