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Finding the Fourth Proportional to 642,405.56, 963,234.81 and 243,077.18

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Solution

The fourth proportional to 642,405.56, 963,234.81 and 243,077.18 is: 364,474.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,405.56 : 963,234.81 = 243,077.18 : x
  2. Step 2: Convert to fraction form
    642,405.56/963,234.81 = 243,077.18/x
  3. Step 3: Cross multiply
    642,405.56x = 963,234.81 × 243,077.18
  4. Step 4: Simplify right side
    642,405.56x = 234,140,396,476.46
  5. Step 5: Solve for x
    x = 234,140,396,476.46/642,405.56
  6. Step 6: Final answer
    x = 364,474.43

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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.