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Finding the Fourth Proportional to 643,862,415.76, 888,722,816.02 and 376,010,499.88

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Solution

The fourth proportional to 643,862,415.76, 888,722,816.02 and 376,010,499.88 is: 519,007,014.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,862,415.76 : 888,722,816.02 = 376,010,499.88 : x
  2. Step 2: Convert to fraction form
    643,862,415.76/888,722,816.02 = 376,010,499.88/x
  3. Step 3: Cross multiply
    643,862,415.76x = 888,722,816.02 × 376,010,499.88
  4. Step 4: Simplify right side
    643,862,415.76x = 334,169,110,306,441,472
  5. Step 5: Solve for x
    x = 334,169,110,306,441,472/643,862,415.76
  6. Step 6: Final answer
    x = 519,007,014.74

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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.