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Finding the Fourth Proportional to 685,098.68, 945,416.61 and 379,187.60

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Solution

The fourth proportional to 685,098.68, 945,416.61 and 379,187.60 is: 523,268.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,098.68 : 945,416.61 = 379,187.60 : x
  2. Step 2: Convert to fraction form
    685,098.68/945,416.61 = 379,187.60/x
  3. Step 3: Cross multiply
    685,098.68x = 945,416.61 × 379,187.60
  4. Step 4: Simplify right side
    685,098.68x = 358,490,250,618.95
  5. Step 5: Solve for x
    x = 358,490,250,618.95/685,098.68
  6. Step 6: Final answer
    x = 523,268.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.