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Finding the Fourth Proportional to 432,487.20, 648,730.80 and 407,992.80

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Solution

The fourth proportional to 432,487.20, 648,730.80 and 407,992.80 is: 611,989.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,487.20 : 648,730.80 = 407,992.80 : x
  2. Step 2: Convert to fraction form
    432,487.20/648,730.80 = 407,992.80/x
  3. Step 3: Cross multiply
    432,487.20x = 648,730.80 × 407,992.80
  4. Step 4: Simplify right side
    432,487.20x = 264,677,495,538.24
  5. Step 5: Solve for x
    x = 264,677,495,538.24/432,487.20
  6. Step 6: Final answer
    x = 611,989.20

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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.