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Finding the Fourth Proportional to 425,233.98, 638,244.63 and 215,019.54

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Solution

The fourth proportional to 425,233.98, 638,244.63 and 215,019.54 is: 322,728.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,233.98 : 638,244.63 = 215,019.54 : x
  2. Step 2: Convert to fraction form
    425,233.98/638,244.63 = 215,019.54/x
  3. Step 3: Cross multiply
    425,233.98x = 638,244.63 × 215,019.54
  4. Step 4: Simplify right side
    425,233.98x = 137,235,066,750.07
  5. Step 5: Solve for x
    x = 137,235,066,750.07/425,233.98
  6. Step 6: Final answer
    x = 322,728.36

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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.