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Finding the Fourth Proportional to 383,999.90, 575,999.85 and 218,111.90

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Solution

The fourth proportional to 383,999.90, 575,999.85 and 218,111.90 is: 327,167.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,999.90 : 575,999.85 = 218,111.90 : x
  2. Step 2: Convert to fraction form
    383,999.90/575,999.85 = 218,111.90/x
  3. Step 3: Cross multiply
    383,999.90x = 575,999.85 × 218,111.90
  4. Step 4: Simplify right side
    383,999.90x = 125,632,421,683.22
  5. Step 5: Solve for x
    x = 125,632,421,683.22/383,999.90
  6. Step 6: Final answer
    x = 327,167.85

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1.5x scale

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.