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Finding the Fourth Proportional to 215,686.40, 323,529.60 and 141,036.80

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Solution

The fourth proportional to 215,686.40, 323,529.60 and 141,036.80 is: 211,555.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,686.40 : 323,529.60 = 141,036.80 : x
  2. Step 2: Convert to fraction form
    215,686.40/323,529.60 = 141,036.80/x
  3. Step 3: Cross multiply
    215,686.40x = 323,529.60 × 141,036.80
  4. Step 4: Simplify right side
    215,686.40x = 45,629,579,489.28
  5. Step 5: Solve for x
    x = 45,629,579,489.28/215,686.40
  6. Step 6: Final answer
    x = 211,555.20

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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.