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Finding the Fourth Proportional to 458,485.02, 687,694.92 and 121,518.18

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Solution

The fourth proportional to 458,485.02, 687,694.92 and 121,518.18 is: 182,268.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,485.02 : 687,694.92 = 121,518.18 : x
  2. Step 2: Convert to fraction form
    458,485.02/687,694.92 = 121,518.18/x
  3. Step 3: Cross multiply
    458,485.02x = 687,694.92 × 121,518.18
  4. Step 4: Simplify right side
    458,485.02x = 83,567,435,073.65
  5. Step 5: Solve for x
    x = 83,567,435,073.65/458,485.02
  6. Step 6: Final answer
    x = 182,268.63

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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.