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Finding the Fourth Proportional to 324,971.60, 487,745.40 and 191,685.20

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Solution

The fourth proportional to 324,971.60, 487,745.40 and 191,685.20 is: 287,697.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,971.60 : 487,745.40 = 191,685.20 : x
  2. Step 2: Convert to fraction form
    324,971.60/487,745.40 = 191,685.20/x
  3. Step 3: Cross multiply
    324,971.60x = 487,745.40 × 191,685.20
  4. Step 4: Simplify right side
    324,971.60x = 93,493,574,548.08
  5. Step 5: Solve for x
    x = 93,493,574,548.08/324,971.60
  6. Step 6: Final answer
    x = 287,697.68

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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.