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Finding the Fourth Proportional to 661,695.60, 992,057.40 and 262,138.80

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Solution

The fourth proportional to 661,695.60, 992,057.40 and 262,138.80 is: 393,015.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,695.60 : 992,057.40 = 262,138.80 : x
  2. Step 2: Convert to fraction form
    661,695.60/992,057.40 = 262,138.80/x
  3. Step 3: Cross multiply
    661,695.60x = 992,057.40 × 262,138.80
  4. Step 4: Simplify right side
    661,695.60x = 260,056,736,367.12
  5. Step 5: Solve for x
    x = 260,056,736,367.12/661,695.60
  6. Step 6: Final answer
    x = 393,015.67

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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.