Home / 718,212,456.30-991,133,614.89-400,672,703.64

Finding the Fourth Proportional to 718,212,456.30, 991,133,614.89 and 400,672,703.64

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Solution

The fourth proportional to 718,212,456.30, 991,133,614.89 and 400,672,703.64 is: 552,928,568.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,212,456.30 : 991,133,614.89 = 400,672,703.64 : x
  2. Step 2: Convert to fraction form
    718,212,456.30/991,133,614.89 = 400,672,703.64/x
  3. Step 3: Cross multiply
    718,212,456.30x = 991,133,614.89 × 400,672,703.64
  4. Step 4: Simplify right side
    718,212,456.30x = 397,120,185,146,462,848
  5. Step 5: Solve for x
    x = 397,120,185,146,462,848/718,212,456.30
  6. Step 6: Final answer
    x = 552,928,568.23

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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.