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Finding the Fourth Proportional to 640,232.20, 958,274.70 and 453,608.20

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Solution

The fourth proportional to 640,232.20, 958,274.70 and 453,608.20 is: 678,943.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,232.20 : 958,274.70 = 453,608.20 : x
  2. Step 2: Convert to fraction form
    640,232.20/958,274.70 = 453,608.20/x
  3. Step 3: Cross multiply
    640,232.20x = 958,274.70 × 453,608.20
  4. Step 4: Simplify right side
    640,232.20x = 434,681,261,772.54
  5. Step 5: Solve for x
    x = 434,681,261,772.54/640,232.20
  6. Step 6: Final answer
    x = 678,943.14

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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.