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Finding the Fourth Proportional to 398,818.80, 598,228.20 and 162,331.20

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Solution

The fourth proportional to 398,818.80, 598,228.20 and 162,331.20 is: 243,496.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,818.80 : 598,228.20 = 162,331.20 : x
  2. Step 2: Convert to fraction form
    398,818.80/598,228.20 = 162,331.20/x
  3. Step 3: Cross multiply
    398,818.80x = 598,228.20 × 162,331.20
  4. Step 4: Simplify right side
    398,818.80x = 97,111,101,579.84
  5. Step 5: Solve for x
    x = 97,111,101,579.84/398,818.80
  6. Step 6: Final answer
    x = 243,496.80

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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.