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Finding the Fourth Proportional to 561,667.36, 775,099.20 and 307,018.72

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Solution

The fourth proportional to 561,667.36, 775,099.20 and 307,018.72 is: 423,684.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,667.36 : 775,099.20 = 307,018.72 : x
  2. Step 2: Convert to fraction form
    561,667.36/775,099.20 = 307,018.72/x
  3. Step 3: Cross multiply
    561,667.36x = 775,099.20 × 307,018.72
  4. Step 4: Simplify right side
    561,667.36x = 237,969,964,257.02
  5. Step 5: Solve for x
    x = 237,969,964,257.02/561,667.36
  6. Step 6: Final answer
    x = 423,684.87

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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.