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Finding the Fourth Proportional to 432,091.80, 648,137.70 and 299,122.20

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Solution

The fourth proportional to 432,091.80, 648,137.70 and 299,122.20 is: 448,683.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,091.80 : 648,137.70 = 299,122.20 : x
  2. Step 2: Convert to fraction form
    432,091.80/648,137.70 = 299,122.20/x
  3. Step 3: Cross multiply
    432,091.80x = 648,137.70 × 299,122.20
  4. Step 4: Simplify right side
    432,091.80x = 193,872,374,726.94
  5. Step 5: Solve for x
    x = 193,872,374,726.94/432,091.80
  6. Step 6: Final answer
    x = 448,683.30

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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.