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Finding the Fourth Proportional to 285,350,429.80, 428,025,644.70 and 186,714,980.20

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Solution

The fourth proportional to 285,350,429.80, 428,025,644.70 and 186,714,980.20 is: 280,072,470.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,350,429.80 : 428,025,644.70 = 186,714,980.20 : x
  2. Step 2: Convert to fraction form
    285,350,429.80/428,025,644.70 = 186,714,980.20/x
  3. Step 3: Cross multiply
    285,350,429.80x = 428,025,644.70 × 186,714,980.20
  4. Step 4: Simplify right side
    285,350,429.80x = 79,918,799,775,252,720
  5. Step 5: Solve for x
    x = 79,918,799,775,252,720/285,350,429.80
  6. Step 6: Final answer
    x = 280,072,470.30

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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.