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Finding the Fourth Proportional to 4,985.88, 7,473.79 and 3,138.31

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Solution

The fourth proportional to 4,985.88, 7,473.79 and 3,138.31 is: 4,704.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,985.88 : 7,473.79 = 3,138.31 : x
  2. Step 2: Convert to fraction form
    4,985.88/7,473.79 = 3,138.31/x
  3. Step 3: Cross multiply
    4,985.88x = 7,473.79 × 3,138.31
  4. Step 4: Simplify right side
    4,985.88x = 23,455,069.89
  5. Step 5: Solve for x
    x = 23,455,069.89/4,985.88
  6. Step 6: Final answer
    x = 4,704.30

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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.