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Finding the Fourth Proportional to 398,679.39, 598,117.50 and 118,196.64

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Solution

The fourth proportional to 398,679.39, 598,117.50 and 118,196.64 is: 177,324.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,679.39 : 598,117.50 = 118,196.64 : x
  2. Step 2: Convert to fraction form
    398,679.39/598,117.50 = 118,196.64/x
  3. Step 3: Cross multiply
    398,679.39x = 598,117.50 × 118,196.64
  4. Step 4: Simplify right side
    398,679.39x = 70,695,478,825.20
  5. Step 5: Solve for x
    x = 70,695,478,825.20/398,679.39
  6. Step 6: Final answer
    x = 177,324.14

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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.