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Finding the Fourth Proportional to 425,528.60, 638,523.30 and 188,907.80

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Solution

The fourth proportional to 425,528.60, 638,523.30 and 188,907.80 is: 283,463.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,528.60 : 638,523.30 = 188,907.80 : x
  2. Step 2: Convert to fraction form
    425,528.60/638,523.30 = 188,907.80/x
  3. Step 3: Cross multiply
    425,528.60x = 638,523.30 × 188,907.80
  4. Step 4: Simplify right side
    425,528.60x = 120,622,031,851.74
  5. Step 5: Solve for x
    x = 120,622,031,851.74/425,528.60
  6. Step 6: Final answer
    x = 283,463.98

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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.