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Finding the Fourth Proportional to 639,004.80, 958,142.70 and 239,658.60

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Solution

The fourth proportional to 639,004.80, 958,142.70 and 239,658.60 is: 359,351.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,004.80 : 958,142.70 = 239,658.60 : x
  2. Step 2: Convert to fraction form
    639,004.80/958,142.70 = 239,658.60/x
  3. Step 3: Cross multiply
    639,004.80x = 958,142.70 × 239,658.60
  4. Step 4: Simplify right side
    639,004.80x = 229,627,138,082.22
  5. Step 5: Solve for x
    x = 229,627,138,082.22/639,004.80
  6. Step 6: Final answer
    x = 359,351.19

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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.