Home / 386,243,408.54-532,999,678.55-218,990,921.42

Finding the Fourth Proportional to 386,243,408.54, 532,999,678.55 and 218,990,921.42

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Solution

The fourth proportional to 386,243,408.54, 532,999,678.55 and 218,990,921.42 is: 302,198,272.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,243,408.54 : 532,999,678.55 = 218,990,921.42 : x
  2. Step 2: Convert to fraction form
    386,243,408.54/532,999,678.55 = 218,990,921.42/x
  3. Step 3: Cross multiply
    386,243,408.54x = 532,999,678.55 × 218,990,921.42
  4. Step 4: Simplify right side
    386,243,408.54x = 116,722,090,722,465,872
  5. Step 5: Solve for x
    x = 116,722,090,722,465,872/386,243,408.54
  6. Step 6: Final answer
    x = 302,198,272.23

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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.