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Finding the Fourth Proportional to 394,600,408.40, 553,347,564.40 and 394,600,408.40

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Solution

The fourth proportional to 394,600,408.40, 553,347,564.40 and 394,600,408.40 is: 553,347,564.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,600,408.40 : 553,347,564.40 = 394,600,408.40 : x
  2. Step 2: Convert to fraction form
    394,600,408.40/553,347,564.40 = 394,600,408.40/x
  3. Step 3: Cross multiply
    394,600,408.40x = 553,347,564.40 × 394,600,408.40
  4. Step 4: Simplify right side
    394,600,408.40x = 218,351,174,899,385,280
  5. Step 5: Solve for x
    x = 218,351,174,899,385,280/394,600,408.40
  6. Step 6: Final answer
    x = 553,347,564.40

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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.