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Finding the Fourth Proportional to 661,432.44, 912,750.32 and 389,511.80

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Solution

The fourth proportional to 661,432.44, 912,750.32 and 389,511.80 is: 537,510.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,432.44 : 912,750.32 = 389,511.80 : x
  2. Step 2: Convert to fraction form
    661,432.44/912,750.32 = 389,511.80/x
  3. Step 3: Cross multiply
    661,432.44x = 912,750.32 × 389,511.80
  4. Step 4: Simplify right side
    661,432.44x = 355,527,020,093.78
  5. Step 5: Solve for x
    x = 355,527,020,093.78/661,432.44
  6. Step 6: Final answer
    x = 537,510.71

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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.