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Finding the Fourth Proportional to 613,909.21, 920,165.52 and 373,493.15

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Solution

The fourth proportional to 613,909.21, 920,165.52 and 373,493.15 is: 559,814.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,909.21 : 920,165.52 = 373,493.15 : x
  2. Step 2: Convert to fraction form
    613,909.21/920,165.52 = 373,493.15/x
  3. Step 3: Cross multiply
    613,909.21x = 920,165.52 × 373,493.15
  4. Step 4: Simplify right side
    613,909.21x = 343,675,519,323.65
  5. Step 5: Solve for x
    x = 343,675,519,323.65/613,909.21
  6. Step 6: Final answer
    x = 559,814.89

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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.