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Finding the Fourth Proportional to 605,610.70, 908,416.05 and 289,905.10

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Solution

The fourth proportional to 605,610.70, 908,416.05 and 289,905.10 is: 434,857.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,610.70 : 908,416.05 = 289,905.10 : x
  2. Step 2: Convert to fraction form
    605,610.70/908,416.05 = 289,905.10/x
  3. Step 3: Cross multiply
    605,610.70x = 908,416.05 × 289,905.10
  4. Step 4: Simplify right side
    605,610.70x = 263,354,445,816.86
  5. Step 5: Solve for x
    x = 263,354,445,816.86/605,610.70
  6. Step 6: Final answer
    x = 434,857.65

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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.