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Finding the Fourth Proportional to 425,311.66, 637,979.81 and 159,021.33

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Solution

The fourth proportional to 425,311.66, 637,979.81 and 159,021.33 is: 238,536.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,311.66 : 637,979.81 = 159,021.33 : x
  2. Step 2: Convert to fraction form
    425,311.66/637,979.81 = 159,021.33/x
  3. Step 3: Cross multiply
    425,311.66x = 637,979.81 × 159,021.33
  4. Step 4: Simplify right side
    425,311.66x = 101,452,397,899.35
  5. Step 5: Solve for x
    x = 101,452,397,899.35/425,311.66
  6. Step 6: Final answer
    x = 238,536.60

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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.