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Finding the Fourth Proportional to 398,758.20, 598,169.67 and 118,274.64

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Solution

The fourth proportional to 398,758.20, 598,169.67 and 118,274.64 is: 177,421.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,758.20 : 598,169.67 = 118,274.64 : x
  2. Step 2: Convert to fraction form
    398,758.20/598,169.67 = 118,274.64/x
  3. Step 3: Cross multiply
    398,758.20x = 598,169.67 × 118,274.64
  4. Step 4: Simplify right side
    398,758.20x = 70,748,302,378.17
  5. Step 5: Solve for x
    x = 70,748,302,378.17/398,758.20
  6. Step 6: Final answer
    x = 177,421.56

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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.