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Finding the Fourth Proportional to 445,408.40, 666,557.40 and 305,440.40

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Solution

The fourth proportional to 445,408.40, 666,557.40 and 305,440.40 is: 457,094.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,408.40 : 666,557.40 = 305,440.40 : x
  2. Step 2: Convert to fraction form
    445,408.40/666,557.40 = 305,440.40/x
  3. Step 3: Cross multiply
    445,408.40x = 666,557.40 × 305,440.40
  4. Step 4: Simplify right side
    445,408.40x = 203,593,558,878.96
  5. Step 5: Solve for x
    x = 203,593,558,878.96/445,408.40
  6. Step 6: Final answer
    x = 457,094.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.