Home / 645,212,368,406.40-890,369,727,947.52-356,174,419,777.48

Finding the Fourth Proportional to 645,212,368,406.40, 890,369,727,947.52 and 356,174,419,777.48

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Solution

The fourth proportional to 645,212,368,406.40, 890,369,727,947.52 and 356,174,419,777.48 is: 491,507,814,740.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,212,368,406.40 : 890,369,727,947.52 = 356,174,419,777.48 : x
  2. Step 2: Convert to fraction form
    645,212,368,406.40/890,369,727,947.52 = 356,174,419,777.48/x
  3. Step 3: Cross multiply
    645,212,368,406.40x = 890,369,727,947.52 × 356,174,419,777.48
  4. Step 4: Simplify right side
    645,212,368,406.40x = 317,126,921,239,140,667,228,160
  5. Step 5: Solve for x
    x = 317,126,921,239,140,667,228,160/645,212,368,406.40
  6. Step 6: Final answer
    x = 491,507,814,740.76

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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.