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Finding the Fourth Proportional to 212,659.60, 318,989.64 and 199,668.76

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Solution

The fourth proportional to 212,659.60, 318,989.64 and 199,668.76 is: 299,503.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,659.60 : 318,989.64 = 199,668.76 : x
  2. Step 2: Convert to fraction form
    212,659.60/318,989.64 = 199,668.76/x
  3. Step 3: Cross multiply
    212,659.60x = 318,989.64 × 199,668.76
  4. Step 4: Simplify right side
    212,659.60x = 63,692,265,871.65
  5. Step 5: Solve for x
    x = 63,692,265,871.65/212,659.60
  6. Step 6: Final answer
    x = 299,503.37

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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.