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Finding the Fourth Proportional to 401,110.80, 601,666.20 and 389,446.80

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Solution

The fourth proportional to 401,110.80, 601,666.20 and 389,446.80 is: 584,170.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,110.80 : 601,666.20 = 389,446.80 : x
  2. Step 2: Convert to fraction form
    401,110.80/601,666.20 = 389,446.80/x
  3. Step 3: Cross multiply
    401,110.80x = 601,666.20 × 389,446.80
  4. Step 4: Simplify right side
    401,110.80x = 234,316,976,258.16
  5. Step 5: Solve for x
    x = 234,316,976,258.16/401,110.80
  6. Step 6: Final answer
    x = 584,170.20

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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.