Home / 393,321,086.40-542,783,012.40-217,109,035.92

Finding the Fourth Proportional to 393,321,086.40, 542,783,012.40 and 217,109,035.92

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Solution

The fourth proportional to 393,321,086.40, 542,783,012.40 and 217,109,035.92 is: 299,610,421.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,321,086.40 : 542,783,012.40 = 217,109,035.92 : x
  2. Step 2: Convert to fraction form
    393,321,086.40/542,783,012.40 = 217,109,035.92/x
  3. Step 3: Cross multiply
    393,321,086.40x = 542,783,012.40 × 217,109,035.92
  4. Step 4: Simplify right side
    393,321,086.40x = 117,843,096,535,917,392
  5. Step 5: Solve for x
    x = 117,843,096,535,917,392/393,321,086.40
  6. Step 6: Final answer
    x = 299,610,421.64

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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.