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Finding the Fourth Proportional to 389,711.20, 585,092.40 and 249,743.20

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Solution

The fourth proportional to 389,711.20, 585,092.40 and 249,743.20 is: 374,951.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,711.20 : 585,092.40 = 249,743.20 : x
  2. Step 2: Convert to fraction form
    389,711.20/585,092.40 = 249,743.20/x
  3. Step 3: Cross multiply
    389,711.20x = 585,092.40 × 249,743.20
  4. Step 4: Simplify right side
    389,711.20x = 146,122,848,271.68
  5. Step 5: Solve for x
    x = 146,122,848,271.68/389,711.20
  6. Step 6: Final answer
    x = 374,951.63

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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.