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Finding the Fourth Proportional to 659,131.80, 988,697.70 and 259,785.60

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Solution

The fourth proportional to 659,131.80, 988,697.70 and 259,785.60 is: 389,678.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,131.80 : 988,697.70 = 259,785.60 : x
  2. Step 2: Convert to fraction form
    659,131.80/988,697.70 = 259,785.60/x
  3. Step 3: Cross multiply
    659,131.80x = 988,697.70 × 259,785.60
  4. Step 4: Simplify right side
    659,131.80x = 256,849,425,213.12
  5. Step 5: Solve for x
    x = 256,849,425,213.12/659,131.80
  6. Step 6: Final answer
    x = 389,678.40

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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.