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Finding the Fourth Proportional to 667,041.99, 920,516.80 and 361,118.25

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Solution

The fourth proportional to 667,041.99, 920,516.80 and 361,118.25 is: 498,342.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,041.99 : 920,516.80 = 361,118.25 : x
  2. Step 2: Convert to fraction form
    667,041.99/920,516.80 = 361,118.25/x
  3. Step 3: Cross multiply
    667,041.99x = 920,516.80 × 361,118.25
  4. Step 4: Simplify right side
    667,041.99x = 332,415,415,911.60
  5. Step 5: Solve for x
    x = 332,415,415,911.60/667,041.99
  6. Step 6: Final answer
    x = 498,342.56

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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.