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Finding the Fourth Proportional to 260,018.10, 358,991.73 and 212,385.78

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Solution

The fourth proportional to 260,018.10, 358,991.73 and 212,385.78 is: 293,228.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,018.10 : 358,991.73 = 212,385.78 : x
  2. Step 2: Convert to fraction form
    260,018.10/358,991.73 = 212,385.78/x
  3. Step 3: Cross multiply
    260,018.10x = 358,991.73 × 212,385.78
  4. Step 4: Simplify right side
    260,018.10x = 76,244,738,589.60
  5. Step 5: Solve for x
    x = 76,244,738,589.60/260,018.10
  6. Step 6: Final answer
    x = 293,228.58

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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.