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Finding the Fourth Proportional to 890,992.64, 1,336,350.72 and 259,840.64

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Solution

The fourth proportional to 890,992.64, 1,336,350.72 and 259,840.64 is: 389,720.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,992.64 : 1,336,350.72 = 259,840.64 : x
  2. Step 2: Convert to fraction form
    890,992.64/1,336,350.72 = 259,840.64/x
  3. Step 3: Cross multiply
    890,992.64x = 1,336,350.72 × 259,840.64
  4. Step 4: Simplify right side
    890,992.64x = 347,238,226,349.26
  5. Step 5: Solve for x
    x = 347,238,226,349.26/890,992.64
  6. Step 6: Final answer
    x = 389,720.64

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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.