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Finding the Fourth Proportional to 432,012.80, 648,019.20 and 132,539.60

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Solution

The fourth proportional to 432,012.80, 648,019.20 and 132,539.60 is: 198,809.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,012.80 : 648,019.20 = 132,539.60 : x
  2. Step 2: Convert to fraction form
    432,012.80/648,019.20 = 132,539.60/x
  3. Step 3: Cross multiply
    432,012.80x = 648,019.20 × 132,539.60
  4. Step 4: Simplify right side
    432,012.80x = 85,888,205,560.32
  5. Step 5: Solve for x
    x = 85,888,205,560.32/432,012.80
  6. Step 6: Final answer
    x = 198,809.40

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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.