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Finding the Fourth Proportional to 275,521.21, 380,231.90 and 153,014.15

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Solution

The fourth proportional to 275,521.21, 380,231.90 and 153,014.15 is: 211,166.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,521.21 : 380,231.90 = 153,014.15 : x
  2. Step 2: Convert to fraction form
    275,521.21/380,231.90 = 153,014.15/x
  3. Step 3: Cross multiply
    275,521.21x = 380,231.90 × 153,014.15
  4. Step 4: Simplify right side
    275,521.21x = 58,180,860,314.83
  5. Step 5: Solve for x
    x = 58,180,860,314.83/275,521.21
  6. Step 6: Final answer
    x = 211,166.54

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1.5x scale

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.