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Finding the Fourth Proportional to 621,377.28, 857,487.21 and 359,743.62

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Solution

The fourth proportional to 621,377.28, 857,487.21 and 359,743.62 is: 496,438.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,377.28 : 857,487.21 = 359,743.62 : x
  2. Step 2: Convert to fraction form
    621,377.28/857,487.21 = 359,743.62/x
  3. Step 3: Cross multiply
    621,377.28x = 857,487.21 × 359,743.62
  4. Step 4: Simplify right side
    621,377.28x = 308,475,551,230.38
  5. Step 5: Solve for x
    x = 308,475,551,230.38/621,377.28
  6. Step 6: Final answer
    x = 496,438.41

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1.5x scale

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.