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Finding the Fourth Proportional to 642,496.56, 963,066.61 and 215,627.57

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Solution

The fourth proportional to 642,496.56, 963,066.61 and 215,627.57 is: 323,213.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,496.56 : 963,066.61 = 215,627.57 : x
  2. Step 2: Convert to fraction form
    642,496.56/963,066.61 = 215,627.57/x
  3. Step 3: Cross multiply
    642,496.56x = 963,066.61 × 215,627.57
  4. Step 4: Simplify right side
    642,496.56x = 207,663,711,928.14
  5. Step 5: Solve for x
    x = 207,663,711,928.14/642,496.56
  6. Step 6: Final answer
    x = 323,213.74

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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.