Home / 1,678.46-2,315.75-1,015.28

Finding the Fourth Proportional to 1,678.46, 2,315.75 and 1,015.28

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Solution

The fourth proportional to 1,678.46, 2,315.75 and 1,015.28 is: 1,400.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.46 : 2,315.75 = 1,015.28 : x
  2. Step 2: Convert to fraction form
    1,678.46/2,315.75 = 1,015.28/x
  3. Step 3: Cross multiply
    1,678.46x = 2,315.75 × 1,015.28
  4. Step 4: Simplify right side
    1,678.46x = 2,351,118.00
  5. Step 5: Solve for x
    x = 2,351,118.00/1,678.46
  6. Step 6: Final answer
    x = 1,400.76

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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.