Home / 1,388.14-1,913.63-1,015.13

Finding the Fourth Proportional to 1,388.14, 1,913.63 and 1,015.13

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Solution

The fourth proportional to 1,388.14, 1,913.63 and 1,015.13 is: 1,399.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388.14 : 1,913.63 = 1,015.13 : x
  2. Step 2: Convert to fraction form
    1,388.14/1,913.63 = 1,015.13/x
  3. Step 3: Cross multiply
    1,388.14x = 1,913.63 × 1,015.13
  4. Step 4: Simplify right side
    1,388.14x = 1,942,582.93
  5. Step 5: Solve for x
    x = 1,942,582.93/1,388.14
  6. Step 6: Final answer
    x = 1,399.42

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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.