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Finding the Fourth Proportional to 638,040.70, 957,190.65 and 217,359.10

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Solution

The fourth proportional to 638,040.70, 957,190.65 and 217,359.10 is: 326,082.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,040.70 : 957,190.65 = 217,359.10 : x
  2. Step 2: Convert to fraction form
    638,040.70/957,190.65 = 217,359.10/x
  3. Step 3: Cross multiply
    638,040.70x = 957,190.65 × 217,359.10
  4. Step 4: Simplify right side
    638,040.70x = 208,054,098,212.42
  5. Step 5: Solve for x
    x = 208,054,098,212.42/638,040.70
  6. Step 6: Final answer
    x = 326,082.80

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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.