Home / 1,148.78-1,582.01-1,078.41

Finding the Fourth Proportional to 1,148.78, 1,582.01 and 1,078.41

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Solution

The fourth proportional to 1,148.78, 1,582.01 and 1,078.41 is: 1,485.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,148.78 : 1,582.01 = 1,078.41 : x
  2. Step 2: Convert to fraction form
    1,148.78/1,582.01 = 1,078.41/x
  3. Step 3: Cross multiply
    1,148.78x = 1,582.01 × 1,078.41
  4. Step 4: Simplify right side
    1,148.78x = 1,706,055.40
  5. Step 5: Solve for x
    x = 1,706,055.40/1,148.78
  6. Step 6: Final answer
    x = 1,485.11

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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.