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Finding the Fourth Proportional to 403,289.12, 604,860.24 and 118,920.80

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Solution

The fourth proportional to 403,289.12, 604,860.24 and 118,920.80 is: 178,359.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,289.12 : 604,860.24 = 118,920.80 : x
  2. Step 2: Convert to fraction form
    403,289.12/604,860.24 = 118,920.80/x
  3. Step 3: Cross multiply
    403,289.12x = 604,860.24 × 118,920.80
  4. Step 4: Simplify right side
    403,289.12x = 71,930,463,628.99
  5. Step 5: Solve for x
    x = 71,930,463,628.99/403,289.12
  6. Step 6: Final answer
    x = 178,359.54

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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.