Home / 1,678.24-2,315.84-1,015.45

Finding the Fourth Proportional to 1,678.24, 2,315.84 and 1,015.45

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Solution

The fourth proportional to 1,678.24, 2,315.84 and 1,015.45 is: 1,401.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.24 : 2,315.84 = 1,015.45 : x
  2. Step 2: Convert to fraction form
    1,678.24/2,315.84 = 1,015.45/x
  3. Step 3: Cross multiply
    1,678.24x = 2,315.84 × 1,015.45
  4. Step 4: Simplify right side
    1,678.24x = 2,351,622.98
  5. Step 5: Solve for x
    x = 2,351,622.98/1,678.24
  6. Step 6: Final answer
    x = 1,401.25

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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.