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Finding the Fourth Proportional to 289,338.20, 434,007.30 and 249,939.80

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Solution

The fourth proportional to 289,338.20, 434,007.30 and 249,939.80 is: 374,909.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,338.20 : 434,007.30 = 249,939.80 : x
  2. Step 2: Convert to fraction form
    289,338.20/434,007.30 = 249,939.80/x
  3. Step 3: Cross multiply
    289,338.20x = 434,007.30 × 249,939.80
  4. Step 4: Simplify right side
    289,338.20x = 108,475,697,760.54
  5. Step 5: Solve for x
    x = 108,475,697,760.54/289,338.20
  6. Step 6: Final answer
    x = 374,909.70

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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.