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Finding the Fourth Proportional to 427,215.84, 640,825.38 and 401,234.28

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Solution

The fourth proportional to 427,215.84, 640,825.38 and 401,234.28 is: 601,852.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,215.84 : 640,825.38 = 401,234.28 : x
  2. Step 2: Convert to fraction form
    427,215.84/640,825.38 = 401,234.28/x
  3. Step 3: Cross multiply
    427,215.84x = 640,825.38 × 401,234.28
  4. Step 4: Simplify right side
    427,215.84x = 257,121,109,950.03
  5. Step 5: Solve for x
    x = 257,121,109,950.03/427,215.84
  6. Step 6: Final answer
    x = 601,852.94

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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.