Home / 458,399.02-687,739.31-218,818.64

Finding the Fourth Proportional to 458,399.02, 687,739.31 and 218,818.64

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Solution

The fourth proportional to 458,399.02, 687,739.31 and 218,818.64 is: 328,295.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,399.02 : 687,739.31 = 218,818.64 : x
  2. Step 2: Convert to fraction form
    458,399.02/687,739.31 = 218,818.64/x
  3. Step 3: Cross multiply
    458,399.02x = 687,739.31 × 218,818.64
  4. Step 4: Simplify right side
    458,399.02x = 150,490,179,394.65
  5. Step 5: Solve for x
    x = 150,490,179,394.65/458,399.02
  6. Step 6: Final answer
    x = 328,295.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.