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Finding the Fourth Proportional to 640,178.56, 960,314.56 and 219,450.88

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Solution

The fourth proportional to 640,178.56, 960,314.56 and 219,450.88 is: 329,192.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,178.56 : 960,314.56 = 219,450.88 : x
  2. Step 2: Convert to fraction form
    640,178.56/960,314.56 = 219,450.88/x
  3. Step 3: Cross multiply
    640,178.56x = 960,314.56 × 219,450.88
  4. Step 4: Simplify right side
    640,178.56x = 210,741,875,268.81
  5. Step 5: Solve for x
    x = 210,741,875,268.81/640,178.56
  6. Step 6: Final answer
    x = 329,192.34

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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.