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Finding the Fourth Proportional to 643,740.50, 965,377.47 and 288,571.70

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Solution

The fourth proportional to 643,740.50, 965,377.47 and 288,571.70 is: 432,752.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,740.50 : 965,377.47 = 288,571.70 : x
  2. Step 2: Convert to fraction form
    643,740.50/965,377.47 = 288,571.70/x
  3. Step 3: Cross multiply
    643,740.50x = 965,377.47 × 288,571.70
  4. Step 4: Simplify right side
    643,740.50x = 278,580,617,659.60
  5. Step 5: Solve for x
    x = 278,580,617,659.60/643,740.50
  6. Step 6: Final answer
    x = 432,752.98

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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.