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Finding the Fourth Proportional to 487,644.70, 731,467.05 and 408,912.70

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Solution

The fourth proportional to 487,644.70, 731,467.05 and 408,912.70 is: 613,369.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,644.70 : 731,467.05 = 408,912.70 : x
  2. Step 2: Convert to fraction form
    487,644.70/731,467.05 = 408,912.70/x
  3. Step 3: Cross multiply
    487,644.70x = 731,467.05 × 408,912.70
  4. Step 4: Simplify right side
    487,644.70x = 299,106,166,376.54
  5. Step 5: Solve for x
    x = 299,106,166,376.54/487,644.70
  6. Step 6: Final answer
    x = 613,369.05

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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.