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Finding the Fourth Proportional to 665,326.66, 918,159.56 and 378,847.88

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Solution

The fourth proportional to 665,326.66, 918,159.56 and 378,847.88 is: 522,815.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,326.66 : 918,159.56 = 378,847.88 : x
  2. Step 2: Convert to fraction form
    665,326.66/918,159.56 = 378,847.88/x
  3. Step 3: Cross multiply
    665,326.66x = 918,159.56 × 378,847.88
  4. Step 4: Simplify right side
    665,326.66x = 347,842,802,807.73
  5. Step 5: Solve for x
    x = 347,842,802,807.73/665,326.66
  6. Step 6: Final answer
    x = 522,815.07

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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.