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Finding the Fourth Proportional to 324,785.60, 486,886.80 and 212,519.60

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Solution

The fourth proportional to 324,785.60, 486,886.80 and 212,519.60 is: 318,588.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,785.60 : 486,886.80 = 212,519.60 : x
  2. Step 2: Convert to fraction form
    324,785.60/486,886.80 = 212,519.60/x
  3. Step 3: Cross multiply
    324,785.60x = 486,886.80 × 212,519.60
  4. Step 4: Simplify right side
    324,785.60x = 103,472,987,981.28
  5. Step 5: Solve for x
    x = 103,472,987,981.28/324,785.60
  6. Step 6: Final answer
    x = 318,588.60

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1.5x scale

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.