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Finding the Fourth Proportional to 478,487.20, 717,730.80 and 336,769.60

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Solution

The fourth proportional to 478,487.20, 717,730.80 and 336,769.60 is: 505,154.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,487.20 : 717,730.80 = 336,769.60 : x
  2. Step 2: Convert to fraction form
    478,487.20/717,730.80 = 336,769.60/x
  3. Step 3: Cross multiply
    478,487.20x = 717,730.80 × 336,769.60
  4. Step 4: Simplify right side
    478,487.20x = 241,709,914,423.68
  5. Step 5: Solve for x
    x = 241,709,914,423.68/478,487.20
  6. Step 6: Final answer
    x = 505,154.40

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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.