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Finding the Fourth Proportional to 400,858,881.90, 561,967,709.70 and 400,858,881.90

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Solution

The fourth proportional to 400,858,881.90, 561,967,709.70 and 400,858,881.90 is: 561,967,709.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,858,881.90 : 561,967,709.70 = 400,858,881.90 : x
  2. Step 2: Convert to fraction form
    400,858,881.90/561,967,709.70 = 400,858,881.90/x
  3. Step 3: Cross multiply
    400,858,881.90x = 561,967,709.70 × 400,858,881.90
  4. Step 4: Simplify right side
    400,858,881.90x = 225,269,747,774,245,792
  5. Step 5: Solve for x
    x = 225,269,747,774,245,792/400,858,881.90
  6. Step 6: Final answer
    x = 561,967,709.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.