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Finding the Fourth Proportional to 4,985.85, 7,478.43 and 2,765.73

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Solution

The fourth proportional to 4,985.85, 7,478.43 and 2,765.73 is: 4,148.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,985.85 : 7,478.43 = 2,765.73 : x
  2. Step 2: Convert to fraction form
    4,985.85/7,478.43 = 2,765.73/x
  3. Step 3: Cross multiply
    4,985.85x = 7,478.43 × 2,765.73
  4. Step 4: Simplify right side
    4,985.85x = 20,683,318.20
  5. Step 5: Solve for x
    x = 20,683,318.20/4,985.85
  6. Step 6: Final answer
    x = 4,148.40

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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.