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Finding the Fourth Proportional to 664,641.40, 995,558.10 and 440,109.40

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Solution

The fourth proportional to 664,641.40, 995,558.10 and 440,109.40 is: 659,234.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,641.40 : 995,558.10 = 440,109.40 : x
  2. Step 2: Convert to fraction form
    664,641.40/995,558.10 = 440,109.40/x
  3. Step 3: Cross multiply
    664,641.40x = 995,558.10 × 440,109.40
  4. Step 4: Simplify right side
    664,641.40x = 438,154,478,056.14
  5. Step 5: Solve for x
    x = 438,154,478,056.14/664,641.40
  6. Step 6: Final answer
    x = 659,234.41

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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.