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Finding the Fourth Proportional to 403,498.40, 603,692.40 and 263,530.40

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Solution

The fourth proportional to 403,498.40, 603,692.40 and 263,530.40 is: 394,279.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,498.40 : 603,692.40 = 263,530.40 : x
  2. Step 2: Convert to fraction form
    403,498.40/603,692.40 = 263,530.40/x
  3. Step 3: Cross multiply
    403,498.40x = 603,692.40 × 263,530.40
  4. Step 4: Simplify right side
    403,498.40x = 159,091,299,648.96
  5. Step 5: Solve for x
    x = 159,091,299,648.96/403,498.40
  6. Step 6: Final answer
    x = 394,279.88

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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.