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Finding the Fourth Proportional to 667,170.90, 920,920.57 and 405,525.42

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Solution

The fourth proportional to 667,170.90, 920,920.57 and 405,525.42 is: 559,761.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,170.90 : 920,920.57 = 405,525.42 : x
  2. Step 2: Convert to fraction form
    667,170.90/920,920.57 = 405,525.42/x
  3. Step 3: Cross multiply
    667,170.90x = 920,920.57 × 405,525.42
  4. Step 4: Simplify right side
    667,170.90x = 373,456,699,922.08
  5. Step 5: Solve for x
    x = 373,456,699,922.08/667,170.90
  6. Step 6: Final answer
    x = 559,761.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.