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Finding the Fourth Proportional to 425,705.44, 638,373.09 and 122,032.72

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Solution

The fourth proportional to 425,705.44, 638,373.09 and 122,032.72 is: 182,996.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,705.44 : 638,373.09 = 122,032.72 : x
  2. Step 2: Convert to fraction form
    425,705.44/638,373.09 = 122,032.72/x
  3. Step 3: Cross multiply
    425,705.44x = 638,373.09 × 122,032.72
  4. Step 4: Simplify right side
    425,705.44x = 77,902,404,547.50
  5. Step 5: Solve for x
    x = 77,902,404,547.50/425,705.44
  6. Step 6: Final answer
    x = 182,996.03

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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.