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Finding the Fourth Proportional to 386,468,665.70, 579,702,998.55 and 264,024,659.30

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Solution

The fourth proportional to 386,468,665.70, 579,702,998.55 and 264,024,659.30 is: 396,036,988.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,468,665.70 : 579,702,998.55 = 264,024,659.30 : x
  2. Step 2: Convert to fraction form
    386,468,665.70/579,702,998.55 = 264,024,659.30/x
  3. Step 3: Cross multiply
    386,468,665.70x = 579,702,998.55 × 264,024,659.30
  4. Step 4: Simplify right side
    386,468,665.70x = 153,055,886,687,352,128
  5. Step 5: Solve for x
    x = 153,055,886,687,352,128/386,468,665.70
  6. Step 6: Final answer
    x = 396,036,988.95

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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.