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Finding the Fourth Proportional to 639,313.20, 958,313.70 and 372,936.60

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Solution

The fourth proportional to 639,313.20, 958,313.70 and 372,936.60 is: 559,022.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,313.20 : 958,313.70 = 372,936.60 : x
  2. Step 2: Convert to fraction form
    639,313.20/958,313.70 = 372,936.60/x
  3. Step 3: Cross multiply
    639,313.20x = 958,313.70 × 372,936.60
  4. Step 4: Simplify right side
    639,313.20x = 357,390,253,011.42
  5. Step 5: Solve for x
    x = 357,390,253,011.42/639,313.20
  6. Step 6: Final answer
    x = 559,022.17

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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.