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Finding the Fourth Proportional to 639,444.36, 959,143.74 and 159,674.84

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Solution

The fourth proportional to 639,444.36, 959,143.74 and 159,674.84 is: 239,506.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,444.36 : 959,143.74 = 159,674.84 : x
  2. Step 2: Convert to fraction form
    639,444.36/959,143.74 = 159,674.84/x
  3. Step 3: Cross multiply
    639,444.36x = 959,143.74 × 159,674.84
  4. Step 4: Simplify right side
    639,444.36x = 153,151,123,221.50
  5. Step 5: Solve for x
    x = 153,151,123,221.50/639,444.36
  6. Step 6: Final answer
    x = 239,506.57

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Double scale
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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.