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Finding the Fourth Proportional to 289,235.55, 399,133.40 and 168,380.31

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Solution

The fourth proportional to 289,235.55, 399,133.40 and 168,380.31 is: 232,358.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,235.55 : 399,133.40 = 168,380.31 : x
  2. Step 2: Convert to fraction form
    289,235.55/399,133.40 = 168,380.31/x
  3. Step 3: Cross multiply
    289,235.55x = 399,133.40 × 168,380.31
  4. Step 4: Simplify right side
    289,235.55x = 67,206,204,781.45
  5. Step 5: Solve for x
    x = 67,206,204,781.45/289,235.55
  6. Step 6: Final answer
    x = 232,358.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.