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Finding the Fourth Proportional to 432,868.80, 649,303.20 and 354,136.80

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Solution

The fourth proportional to 432,868.80, 649,303.20 and 354,136.80 is: 531,205.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,868.80 : 649,303.20 = 354,136.80 : x
  2. Step 2: Convert to fraction form
    432,868.80/649,303.20 = 354,136.80/x
  3. Step 3: Cross multiply
    432,868.80x = 649,303.20 × 354,136.80
  4. Step 4: Simplify right side
    432,868.80x = 229,942,157,477.76
  5. Step 5: Solve for x
    x = 229,942,157,477.76/432,868.80
  6. Step 6: Final answer
    x = 531,205.20

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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.