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Finding the Fourth Proportional to 587,110.50, 810,212.49 and 318,838.50

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Solution

The fourth proportional to 587,110.50, 810,212.49 and 318,838.50 is: 439,997.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,110.50 : 810,212.49 = 318,838.50 : x
  2. Step 2: Convert to fraction form
    587,110.50/810,212.49 = 318,838.50/x
  3. Step 3: Cross multiply
    587,110.50x = 810,212.49 × 318,838.50
  4. Step 4: Simplify right side
    587,110.50x = 258,326,934,992.87
  5. Step 5: Solve for x
    x = 258,326,934,992.87/587,110.50
  6. Step 6: Final answer
    x = 439,997.13

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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.