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Finding the Fourth Proportional to 645,640.60, 968,460.90 and 433,064.20

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Solution

The fourth proportional to 645,640.60, 968,460.90 and 433,064.20 is: 649,596.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,640.60 : 968,460.90 = 433,064.20 : x
  2. Step 2: Convert to fraction form
    645,640.60/968,460.90 = 433,064.20/x
  3. Step 3: Cross multiply
    645,640.60x = 968,460.90 × 433,064.20
  4. Step 4: Simplify right side
    645,640.60x = 419,405,744,889.78
  5. Step 5: Solve for x
    x = 419,405,744,889.78/645,640.60
  6. Step 6: Final answer
    x = 649,596.30

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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.