Home / 1,639.24-2,263.16-1,219.12

Finding the Fourth Proportional to 1,639.24, 2,263.16 and 1,219.12

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Solution

The fourth proportional to 1,639.24, 2,263.16 and 1,219.12 is: 1,683.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.24 : 2,263.16 = 1,219.12 : x
  2. Step 2: Convert to fraction form
    1,639.24/2,263.16 = 1,219.12/x
  3. Step 3: Cross multiply
    1,639.24x = 2,263.16 × 1,219.12
  4. Step 4: Simplify right side
    1,639.24x = 2,759,061.01
  5. Step 5: Solve for x
    x = 2,759,061.01/1,639.24
  6. Step 6: Final answer
    x = 1,683.14

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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.