Home / 1,065.25-1,469.88-623.20

Finding the Fourth Proportional to 1,065.25, 1,469.88 and 623.20

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Solution

The fourth proportional to 1,065.25, 1,469.88 and 623.20 is: 859.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,065.25 : 1,469.88 = 623.20 : x
  2. Step 2: Convert to fraction form
    1,065.25/1,469.88 = 623.20/x
  3. Step 3: Cross multiply
    1,065.25x = 1,469.88 × 623.20
  4. Step 4: Simplify right side
    1,065.25x = 916,029.22
  5. Step 5: Solve for x
    x = 916,029.22/1,065.25
  6. Step 6: Final answer
    x = 859.92

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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.