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Finding the Fourth Proportional to 863,930.80, 1,294,802.70 and 330,740.20

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Solution

The fourth proportional to 863,930.80, 1,294,802.70 and 330,740.20 is: 495,691.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    863,930.80 : 1,294,802.70 = 330,740.20 : x
  2. Step 2: Convert to fraction form
    863,930.80/1,294,802.70 = 330,740.20/x
  3. Step 3: Cross multiply
    863,930.80x = 1,294,802.70 × 330,740.20
  4. Step 4: Simplify right side
    863,930.80x = 428,243,303,958.54
  5. Step 5: Solve for x
    x = 428,243,303,958.54/863,930.80
  6. Step 6: Final answer
    x = 495,691.67

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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.