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Finding the Fourth Proportional to 6,145.41, 9,219.42 and 1,985.65

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Solution

The fourth proportional to 6,145.41, 9,219.42 and 1,985.65 is: 2,978.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,145.41 : 9,219.42 = 1,985.65 : x
  2. Step 2: Convert to fraction form
    6,145.41/9,219.42 = 1,985.65/x
  3. Step 3: Cross multiply
    6,145.41x = 9,219.42 × 1,985.65
  4. Step 4: Simplify right side
    6,145.41x = 18,306,541.32
  5. Step 5: Solve for x
    x = 18,306,541.32/6,145.41
  6. Step 6: Final answer
    x = 2,978.90

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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.