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Finding the Fourth Proportional to 324,465.60, 486,698.40 and 212,491.20

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Solution

The fourth proportional to 324,465.60, 486,698.40 and 212,491.20 is: 318,736.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,465.60 : 486,698.40 = 212,491.20 : x
  2. Step 2: Convert to fraction form
    324,465.60/486,698.40 = 212,491.20/x
  3. Step 3: Cross multiply
    324,465.60x = 486,698.40 × 212,491.20
  4. Step 4: Simplify right side
    324,465.60x = 103,419,127,054.08
  5. Step 5: Solve for x
    x = 103,419,127,054.08/324,465.60
  6. Step 6: Final answer
    x = 318,736.80

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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.