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Finding the Fourth Proportional to 634,644,674.72, 875,895,113.36 and 356,201,430.56

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Solution

The fourth proportional to 634,644,674.72, 875,895,113.36 and 356,201,430.56 is: 491,605,940.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    634,644,674.72 : 875,895,113.36 = 356,201,430.56 : x
  2. Step 2: Convert to fraction form
    634,644,674.72/875,895,113.36 = 356,201,430.56/x
  3. Step 3: Cross multiply
    634,644,674.72x = 875,895,113.36 × 356,201,430.56
  4. Step 4: Simplify right side
    634,644,674.72x = 311,995,092,399,345,344
  5. Step 5: Solve for x
    x = 311,995,092,399,345,344/634,644,674.72
  6. Step 6: Final answer
    x = 491,605,940.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.