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Finding the Fourth Proportional to 425,328.80, 638,284.80 and 188,841.20

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Solution

The fourth proportional to 425,328.80, 638,284.80 and 188,841.20 is: 283,391.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,328.80 : 638,284.80 = 188,841.20 : x
  2. Step 2: Convert to fraction form
    425,328.80/638,284.80 = 188,841.20/x
  3. Step 3: Cross multiply
    425,328.80x = 638,284.80 × 188,841.20
  4. Step 4: Simplify right side
    425,328.80x = 120,534,467,573.76
  5. Step 5: Solve for x
    x = 120,534,467,573.76/425,328.80
  6. Step 6: Final answer
    x = 283,391.27

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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.