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Finding the Fourth Proportional to 418,748.70, 628,123.05 and 376,758.30

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Solution

The fourth proportional to 418,748.70, 628,123.05 and 376,758.30 is: 565,137.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,748.70 : 628,123.05 = 376,758.30 : x
  2. Step 2: Convert to fraction form
    418,748.70/628,123.05 = 376,758.30/x
  3. Step 3: Cross multiply
    418,748.70x = 628,123.05 × 376,758.30
  4. Step 4: Simplify right side
    418,748.70x = 236,650,572,508.82
  5. Step 5: Solve for x
    x = 236,650,572,508.82/418,748.70
  6. Step 6: Final answer
    x = 565,137.45

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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.