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Finding the Fourth Proportional to 372,011.70, 513,353.19 and 208,659.21

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Solution

The fourth proportional to 372,011.70, 513,353.19 and 208,659.21 is: 287,936.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,011.70 : 513,353.19 = 208,659.21 : x
  2. Step 2: Convert to fraction form
    372,011.70/513,353.19 = 208,659.21/x
  3. Step 3: Cross multiply
    372,011.70x = 513,353.19 × 208,659.21
  4. Step 4: Simplify right side
    372,011.70x = 107,115,871,076.38
  5. Step 5: Solve for x
    x = 107,115,871,076.38/372,011.70
  6. Step 6: Final answer
    x = 287,936.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.