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Finding the Fourth Proportional to 425,178, 637,796.16 and 140,868

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Solution

The fourth proportional to 425,178, 637,796.16 and 140,868 is: 211,311.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,178 : 637,796.16 = 140,868 : x
  2. Step 2: Convert to fraction form
    425,178/637,796.16 = 140,868/x
  3. Step 3: Cross multiply
    425,178x = 637,796.16 × 140,868
  4. Step 4: Simplify right side
    425,178x = 89,845,069,466.88
  5. Step 5: Solve for x
    x = 89,845,069,466.88/425,178
  6. Step 6: Final answer
    x = 211,311.66

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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.