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Finding the Fourth Proportional to 281,145.20, 421,717.80 and 186,666.80

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Solution

The fourth proportional to 281,145.20, 421,717.80 and 186,666.80 is: 280,000.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,145.20 : 421,717.80 = 186,666.80 : x
  2. Step 2: Convert to fraction form
    281,145.20/421,717.80 = 186,666.80/x
  3. Step 3: Cross multiply
    281,145.20x = 421,717.80 × 186,666.80
  4. Step 4: Simplify right side
    281,145.20x = 78,720,712,229.04
  5. Step 5: Solve for x
    x = 78,720,712,229.04/281,145.20
  6. Step 6: Final answer
    x = 280,000.20

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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.