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Finding the Fourth Proportional to 638,014.02, 957,157.11 and 318,337.78

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Solution

The fourth proportional to 638,014.02, 957,157.11 and 318,337.78 is: 477,574.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,014.02 : 957,157.11 = 318,337.78 : x
  2. Step 2: Convert to fraction form
    638,014.02/957,157.11 = 318,337.78/x
  3. Step 3: Cross multiply
    638,014.02x = 957,157.11 × 318,337.78
  4. Step 4: Simplify right side
    638,014.02x = 304,699,269,508.62
  5. Step 5: Solve for x
    x = 304,699,269,508.62/638,014.02
  6. Step 6: Final answer
    x = 477,574.57

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Double scale
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Similar ratio
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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.