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Finding the Fourth Proportional to 436,257.99, 654,401.55 and 120,688.47

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Solution

The fourth proportional to 436,257.99, 654,401.55 and 120,688.47 is: 181,036.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,257.99 : 654,401.55 = 120,688.47 : x
  2. Step 2: Convert to fraction form
    436,257.99/654,401.55 = 120,688.47/x
  3. Step 3: Cross multiply
    436,257.99x = 654,401.55 × 120,688.47
  4. Step 4: Simplify right side
    436,257.99x = 78,978,721,835.13
  5. Step 5: Solve for x
    x = 78,978,721,835.13/436,257.99
  6. Step 6: Final answer
    x = 181,036.73

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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.