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Finding the Fourth Proportional to 469,980.79, 648,574.31 and 255,121

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Solution

The fourth proportional to 469,980.79, 648,574.31 and 255,121 is: 352,067.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    469,980.79 : 648,574.31 = 255,121 : x
  2. Step 2: Convert to fraction form
    469,980.79/648,574.31 = 255,121/x
  3. Step 3: Cross multiply
    469,980.79x = 648,574.31 × 255,121
  4. Step 4: Simplify right side
    469,980.79x = 165,464,926,541.51
  5. Step 5: Solve for x
    x = 165,464,926,541.51/469,980.79
  6. Step 6: Final answer
    x = 352,067.43

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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.