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Finding the Fourth Proportional to 389,863.40, 585,140.70 and 333,876.20

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Solution

The fourth proportional to 389,863.40, 585,140.70 and 333,876.20 is: 501,110.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,863.40 : 585,140.70 = 333,876.20 : x
  2. Step 2: Convert to fraction form
    389,863.40/585,140.70 = 333,876.20/x
  3. Step 3: Cross multiply
    389,863.40x = 585,140.70 × 333,876.20
  4. Step 4: Simplify right side
    389,863.40x = 195,364,553,381.34
  5. Step 5: Solve for x
    x = 195,364,553,381.34/389,863.40
  6. Step 6: Final answer
    x = 501,110.27

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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.