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Finding the Fourth Proportional to 666,715.50, 920,067.40 and 364,909.50

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Solution

The fourth proportional to 666,715.50, 920,067.40 and 364,909.50 is: 503,575.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,715.50 : 920,067.40 = 364,909.50 : x
  2. Step 2: Convert to fraction form
    666,715.50/920,067.40 = 364,909.50/x
  3. Step 3: Cross multiply
    666,715.50x = 920,067.40 × 364,909.50
  4. Step 4: Simplify right side
    666,715.50x = 335,741,334,900.30
  5. Step 5: Solve for x
    x = 335,741,334,900.30/666,715.50
  6. Step 6: Final answer
    x = 503,575.12

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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.