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Finding the Fourth Proportional to 518,879.60, 778,261.80 and 144,940.40

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Solution

The fourth proportional to 518,879.60, 778,261.80 and 144,940.40 is: 217,394.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,879.60 : 778,261.80 = 144,940.40 : x
  2. Step 2: Convert to fraction form
    518,879.60/778,261.80 = 144,940.40/x
  3. Step 3: Cross multiply
    518,879.60x = 778,261.80 × 144,940.40
  4. Step 4: Simplify right side
    518,879.60x = 112,801,576,596.72
  5. Step 5: Solve for x
    x = 112,801,576,596.72/518,879.60
  6. Step 6: Final answer
    x = 217,394.51

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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.