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Finding the Fourth Proportional to 862,651.60, 1,293,670.20 and 389,563.60

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Solution

The fourth proportional to 862,651.60, 1,293,670.20 and 389,563.60 is: 584,206.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    862,651.60 : 1,293,670.20 = 389,563.60 : x
  2. Step 2: Convert to fraction form
    862,651.60/1,293,670.20 = 389,563.60/x
  3. Step 3: Cross multiply
    862,651.60x = 1,293,670.20 × 389,563.60
  4. Step 4: Simplify right side
    862,651.60x = 503,966,820,324.72
  5. Step 5: Solve for x
    x = 503,966,820,324.72/862,651.60
  6. Step 6: Final answer
    x = 584,206.67

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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.