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Finding the Fourth Proportional to 425,604.02, 639,129.14 and 284,356.96

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Solution

The fourth proportional to 425,604.02, 639,129.14 and 284,356.96 is: 427,018.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,604.02 : 639,129.14 = 284,356.96 : x
  2. Step 2: Convert to fraction form
    425,604.02/639,129.14 = 284,356.96/x
  3. Step 3: Cross multiply
    425,604.02x = 639,129.14 × 284,356.96
  4. Step 4: Simplify right side
    425,604.02x = 181,740,819,297.81
  5. Step 5: Solve for x
    x = 181,740,819,297.81/425,604.02
  6. Step 6: Final answer
    x = 427,018.57

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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.