Home / 3,311.48-4,569.50-1,985.15

Finding the Fourth Proportional to 3,311.48, 4,569.50 and 1,985.15

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Solution

The fourth proportional to 3,311.48, 4,569.50 and 1,985.15 is: 2,739.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,311.48 : 4,569.50 = 1,985.15 : x
  2. Step 2: Convert to fraction form
    3,311.48/4,569.50 = 1,985.15/x
  3. Step 3: Cross multiply
    3,311.48x = 4,569.50 × 1,985.15
  4. Step 4: Simplify right side
    3,311.48x = 9,071,142.93
  5. Step 5: Solve for x
    x = 9,071,142.93/3,311.48
  6. Step 6: Final answer
    x = 2,739.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.