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Finding the Fourth Proportional to 642,671.70, 964,007.55 and 327,743.70

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Solution

The fourth proportional to 642,671.70, 964,007.55 and 327,743.70 is: 491,615.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,671.70 : 964,007.55 = 327,743.70 : x
  2. Step 2: Convert to fraction form
    642,671.70/964,007.55 = 327,743.70/x
  3. Step 3: Cross multiply
    642,671.70x = 964,007.55 × 327,743.70
  4. Step 4: Simplify right side
    642,671.70x = 315,947,401,264.94
  5. Step 5: Solve for x
    x = 315,947,401,264.94/642,671.70
  6. Step 6: Final answer
    x = 491,615.55

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Double scale
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Similar ratio
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1.5x scale

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.