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Finding the Fourth Proportional to 379,970.56, 524,313.90 and 210,181.60

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Solution

The fourth proportional to 379,970.56, 524,313.90 and 210,181.60 is: 290,025.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,970.56 : 524,313.90 = 210,181.60 : x
  2. Step 2: Convert to fraction form
    379,970.56/524,313.90 = 210,181.60/x
  3. Step 3: Cross multiply
    379,970.56x = 524,313.90 × 210,181.60
  4. Step 4: Simplify right side
    379,970.56x = 110,201,134,404.24
  5. Step 5: Solve for x
    x = 110,201,134,404.24/379,970.56
  6. Step 6: Final answer
    x = 290,025.45

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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.