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Finding the Fourth Proportional to 665,330.41, 918,164.73 and 378,851.64

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Solution

The fourth proportional to 665,330.41, 918,164.73 and 378,851.64 is: 522,820.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,330.41 : 918,164.73 = 378,851.64 : x
  2. Step 2: Convert to fraction form
    665,330.41/918,164.73 = 378,851.64/x
  3. Step 3: Cross multiply
    665,330.41x = 918,164.73 × 378,851.64
  4. Step 4: Simplify right side
    665,330.41x = 347,848,213,750.66
  5. Step 5: Solve for x
    x = 347,848,213,750.66/665,330.41
  6. Step 6: Final answer
    x = 522,820.25

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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.