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Finding the Fourth Proportional to 587,217, 810,360.27 and 318,945

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Solution

The fourth proportional to 587,217, 810,360.27 and 318,945 is: 440,144.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,217 : 810,360.27 = 318,945 : x
  2. Step 2: Convert to fraction form
    587,217/810,360.27 = 318,945/x
  3. Step 3: Cross multiply
    587,217x = 810,360.27 × 318,945
  4. Step 4: Simplify right side
    587,217x = 258,460,356,315.15
  5. Step 5: Solve for x
    x = 258,460,356,315.15/587,217
  6. Step 6: Final answer
    x = 440,144.54

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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.