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Finding the Fourth Proportional to 668,916,694.80, 922,896,780.92 and 386,556,268.61

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Solution

The fourth proportional to 668,916,694.80, 922,896,780.92 and 386,556,268.61 is: 533,327,301.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,916,694.80 : 922,896,780.92 = 386,556,268.61 : x
  2. Step 2: Convert to fraction form
    668,916,694.80/922,896,780.92 = 386,556,268.61/x
  3. Step 3: Cross multiply
    668,916,694.80x = 922,896,780.92 × 386,556,268.61
  4. Step 4: Simplify right side
    668,916,694.80x = 356,751,535,946,439,936
  5. Step 5: Solve for x
    x = 356,751,535,946,439,936/668,916,694.80
  6. Step 6: Final answer
    x = 533,327,301.77

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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.