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Finding the Fourth Proportional to 639,006.80, 958,145.70 and 239,660.60

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Solution

The fourth proportional to 639,006.80, 958,145.70 and 239,660.60 is: 359,354.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,006.80 : 958,145.70 = 239,660.60 : x
  2. Step 2: Convert to fraction form
    639,006.80/958,145.70 = 239,660.60/x
  3. Step 3: Cross multiply
    639,006.80x = 958,145.70 × 239,660.60
  4. Step 4: Simplify right side
    639,006.80x = 229,629,773,349.42
  5. Step 5: Solve for x
    x = 229,629,773,349.42/639,006.80
  6. Step 6: Final answer
    x = 359,354.19

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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.