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Finding the Fourth Proportional to 432,861.60, 649,292.40 and 313,975.20

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Solution

The fourth proportional to 432,861.60, 649,292.40 and 313,975.20 is: 470,962.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,861.60 : 649,292.40 = 313,975.20 : x
  2. Step 2: Convert to fraction form
    432,861.60/649,292.40 = 313,975.20/x
  3. Step 3: Cross multiply
    432,861.60x = 649,292.40 × 313,975.20
  4. Step 4: Simplify right side
    432,861.60x = 203,861,711,148.48
  5. Step 5: Solve for x
    x = 203,861,711,148.48/432,861.60
  6. Step 6: Final answer
    x = 470,962.80

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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.