Home / 1,638.18-2,440.69-1,555.56

Finding the Fourth Proportional to 1,638.18, 2,440.69 and 1,555.56

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Solution

The fourth proportional to 1,638.18, 2,440.69 and 1,555.56 is: 2,317.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.18 : 2,440.69 = 1,555.56 : x
  2. Step 2: Convert to fraction form
    1,638.18/2,440.69 = 1,555.56/x
  3. Step 3: Cross multiply
    1,638.18x = 2,440.69 × 1,555.56
  4. Step 4: Simplify right side
    1,638.18x = 3,796,639.74
  5. Step 5: Solve for x
    x = 3,796,639.74/1,638.18
  6. Step 6: Final answer
    x = 2,317.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.