Home / 390,243,958.38-538,487,015.51-222,991,061.13

Finding the Fourth Proportional to 390,243,958.38, 538,487,015.51 and 222,991,061.13

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Solution

The fourth proportional to 390,243,958.38, 538,487,015.51 and 222,991,061.13 is: 307,699,295.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,243,958.38 : 538,487,015.51 = 222,991,061.13 : x
  2. Step 2: Convert to fraction form
    390,243,958.38/538,487,015.51 = 222,991,061.13/x
  3. Step 3: Cross multiply
    390,243,958.38x = 538,487,015.51 × 222,991,061.13
  4. Step 4: Simplify right side
    390,243,958.38x = 120,077,790,993,859,152
  5. Step 5: Solve for x
    x = 120,077,790,993,859,152/390,243,958.38
  6. Step 6: Final answer
    x = 307,699,295.31

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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.