Home / 1,121.37-1,547.40-623.98

Finding the Fourth Proportional to 1,121.37, 1,547.40 and 623.98

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Solution

The fourth proportional to 1,121.37, 1,547.40 and 623.98 is: 861.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.37 : 1,547.40 = 623.98 : x
  2. Step 2: Convert to fraction form
    1,121.37/1,547.40 = 623.98/x
  3. Step 3: Cross multiply
    1,121.37x = 1,547.40 × 623.98
  4. Step 4: Simplify right side
    1,121.37x = 965,546.65
  5. Step 5: Solve for x
    x = 965,546.65/1,121.37
  6. Step 6: Final answer
    x = 861.04

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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.