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Finding the Fourth Proportional to 289,807.20, 434,127.60 and 195,328.80

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Solution

The fourth proportional to 289,807.20, 434,127.60 and 195,328.80 is: 292,600.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,807.20 : 434,127.60 = 195,328.80 : x
  2. Step 2: Convert to fraction form
    289,807.20/434,127.60 = 195,328.80/x
  3. Step 3: Cross multiply
    289,807.20x = 434,127.60 × 195,328.80
  4. Step 4: Simplify right side
    289,807.20x = 84,797,623,154.88
  5. Step 5: Solve for x
    x = 84,797,623,154.88/289,807.20
  6. Step 6: Final answer
    x = 292,600.13

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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.