Home / 1,450.89-2,001.63-1,078.78

Finding the Fourth Proportional to 1,450.89, 2,001.63 and 1,078.78

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Solution

The fourth proportional to 1,450.89, 2,001.63 and 1,078.78 is: 1,488.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,450.89 : 2,001.63 = 1,078.78 : x
  2. Step 2: Convert to fraction form
    1,450.89/2,001.63 = 1,078.78/x
  3. Step 3: Cross multiply
    1,450.89x = 2,001.63 × 1,078.78
  4. Step 4: Simplify right side
    1,450.89x = 2,159,318.41
  5. Step 5: Solve for x
    x = 2,159,318.41/1,450.89
  6. Step 6: Final answer
    x = 1,488.27

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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.