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Finding the Fourth Proportional to 425,416.32, 638,272.08 and 188,925.12

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Solution

The fourth proportional to 425,416.32, 638,272.08 and 188,925.12 is: 283,453.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,416.32 : 638,272.08 = 188,925.12 : x
  2. Step 2: Convert to fraction form
    425,416.32/638,272.08 = 188,925.12/x
  3. Step 3: Cross multiply
    425,416.32x = 638,272.08 × 188,925.12
  4. Step 4: Simplify right side
    425,416.32x = 120,585,629,306.65
  5. Step 5: Solve for x
    x = 120,585,629,306.65/425,416.32
  6. Step 6: Final answer
    x = 283,453.23

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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.