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Finding the Fourth Proportional to 431,357,463.80, 647,036,195.70 and 189,492,759.80

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Solution

The fourth proportional to 431,357,463.80, 647,036,195.70 and 189,492,759.80 is: 284,239,139.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,357,463.80 : 647,036,195.70 = 189,492,759.80 : x
  2. Step 2: Convert to fraction form
    431,357,463.80/647,036,195.70 = 189,492,759.80/x
  3. Step 3: Cross multiply
    431,357,463.80x = 647,036,195.70 × 189,492,759.80
  4. Step 4: Simplify right side
    431,357,463.80x = 122,608,674,413,685,904
  5. Step 5: Solve for x
    x = 122,608,674,413,685,904/431,357,463.80
  6. Step 6: Final answer
    x = 284,239,139.70

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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.