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Finding the Fourth Proportional to 638,462.70, 957,105.90 and 217,445.76

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Solution

The fourth proportional to 638,462.70, 957,105.90 and 217,445.76 is: 325,968.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,462.70 : 957,105.90 = 217,445.76 : x
  2. Step 2: Convert to fraction form
    638,462.70/957,105.90 = 217,445.76/x
  3. Step 3: Cross multiply
    638,462.70x = 957,105.90 × 217,445.76
  4. Step 4: Simplify right side
    638,462.70x = 208,118,619,825.98
  5. Step 5: Solve for x
    x = 208,118,619,825.98/638,462.70
  6. Step 6: Final answer
    x = 325,968.33

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Double scale
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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.