Home / 2,815.47-4,223.21-1,705.17

Finding the Fourth Proportional to 2,815.47, 4,223.21 and 1,705.17

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Solution

The fourth proportional to 2,815.47, 4,223.21 and 1,705.17 is: 2,557.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.47 : 4,223.21 = 1,705.17 : x
  2. Step 2: Convert to fraction form
    2,815.47/4,223.21 = 1,705.17/x
  3. Step 3: Cross multiply
    2,815.47x = 4,223.21 × 1,705.17
  4. Step 4: Simplify right side
    2,815.47x = 7,201,282.47
  5. Step 5: Solve for x
    x = 7,201,282.47/2,815.47
  6. Step 6: Final answer
    x = 2,557.76

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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.