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Finding the Fourth Proportional to 645,902.40, 968,416.20 and 330,099.60

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Solution

The fourth proportional to 645,902.40, 968,416.20 and 330,099.60 is: 494,925.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,902.40 : 968,416.20 = 330,099.60 : x
  2. Step 2: Convert to fraction form
    645,902.40/968,416.20 = 330,099.60/x
  3. Step 3: Cross multiply
    645,902.40x = 968,416.20 × 330,099.60
  4. Step 4: Simplify right side
    645,902.40x = 319,673,800,253.52
  5. Step 5: Solve for x
    x = 319,673,800,253.52/645,902.40
  6. Step 6: Final answer
    x = 494,925.86

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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.