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Finding the Fourth Proportional to 220,718.40, 331,214.40 and 115,612.80

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Solution

The fourth proportional to 220,718.40, 331,214.40 and 115,612.80 is: 173,490.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,718.40 : 331,214.40 = 115,612.80 : x
  2. Step 2: Convert to fraction form
    220,718.40/331,214.40 = 115,612.80/x
  3. Step 3: Cross multiply
    220,718.40x = 331,214.40 × 115,612.80
  4. Step 4: Simplify right side
    220,718.40x = 38,292,624,184.32
  5. Step 5: Solve for x
    x = 38,292,624,184.32/220,718.40
  6. Step 6: Final answer
    x = 173,490.86

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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.