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Finding the Fourth Proportional to 630,779.20, 946,449.60 and 331,187.20

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Solution

The fourth proportional to 630,779.20, 946,449.60 and 331,187.20 is: 496,928.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,779.20 : 946,449.60 = 331,187.20 : x
  2. Step 2: Convert to fraction form
    630,779.20/946,449.60 = 331,187.20/x
  3. Step 3: Cross multiply
    630,779.20x = 946,449.60 × 331,187.20
  4. Step 4: Simplify right side
    630,779.20x = 313,451,992,965.12
  5. Step 5: Solve for x
    x = 313,451,992,965.12/630,779.20
  6. Step 6: Final answer
    x = 496,928.23

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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.