Home / 1,121.19-1,547.44-649.01

Finding the Fourth Proportional to 1,121.19, 1,547.44 and 649.01

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Solution

The fourth proportional to 1,121.19, 1,547.44 and 649.01 is: 895.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.19 : 1,547.44 = 649.01 : x
  2. Step 2: Convert to fraction form
    1,121.19/1,547.44 = 649.01/x
  3. Step 3: Cross multiply
    1,121.19x = 1,547.44 × 649.01
  4. Step 4: Simplify right side
    1,121.19x = 1,004,306.28
  5. Step 5: Solve for x
    x = 1,004,306.28/1,121.19
  6. Step 6: Final answer
    x = 895.75

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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.