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Finding the Fourth Proportional to 398,980.60, 598,497.90 and 162,327.40

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Solution

The fourth proportional to 398,980.60, 598,497.90 and 162,327.40 is: 243,502.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,980.60 : 598,497.90 = 162,327.40 : x
  2. Step 2: Convert to fraction form
    398,980.60/598,497.90 = 162,327.40/x
  3. Step 3: Cross multiply
    398,980.60x = 598,497.90 × 162,327.40
  4. Step 4: Simplify right side
    398,980.60x = 97,152,608,012.46
  5. Step 5: Solve for x
    x = 97,152,608,012.46/398,980.60
  6. Step 6: Final answer
    x = 243,502.09

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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.