Home / 639,207,472.21-882,011,735.27-388,181,318.29

Finding the Fourth Proportional to 639,207,472.21, 882,011,735.27 and 388,181,318.29

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Solution

The fourth proportional to 639,207,472.21, 882,011,735.27 and 388,181,318.29 is: 535,632,784.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,207,472.21 : 882,011,735.27 = 388,181,318.29 : x
  2. Step 2: Convert to fraction form
    639,207,472.21/882,011,735.27 = 388,181,318.29/x
  3. Step 3: Cross multiply
    639,207,472.21x = 882,011,735.27 × 388,181,318.29
  4. Step 4: Simplify right side
    639,207,472.21x = 342,380,478,141,668,864
  5. Step 5: Solve for x
    x = 342,380,478,141,668,864/639,207,472.21
  6. Step 6: Final answer
    x = 535,632,784.39

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1.5x scale

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.