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Finding the Fourth Proportional to 425,795.22, 638,125.40 and 201,215.28

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Solution

The fourth proportional to 425,795.22, 638,125.40 and 201,215.28 is: 301,554.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,795.22 : 638,125.40 = 201,215.28 : x
  2. Step 2: Convert to fraction form
    425,795.22/638,125.40 = 201,215.28/x
  3. Step 3: Cross multiply
    425,795.22x = 638,125.40 × 201,215.28
  4. Step 4: Simplify right side
    425,795.22x = 128,400,581,539.15
  5. Step 5: Solve for x
    x = 128,400,581,539.15/425,795.22
  6. Step 6: Final answer
    x = 301,554.77

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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.