Home / 1,820.10-2,511.36-1,121.34

Finding the Fourth Proportional to 1,820.10, 2,511.36 and 1,121.34

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Solution

The fourth proportional to 1,820.10, 2,511.36 and 1,121.34 is: 1,547.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,820.10 : 2,511.36 = 1,121.34 : x
  2. Step 2: Convert to fraction form
    1,820.10/2,511.36 = 1,121.34/x
  3. Step 3: Cross multiply
    1,820.10x = 2,511.36 × 1,121.34
  4. Step 4: Simplify right side
    1,820.10x = 2,816,088.42
  5. Step 5: Solve for x
    x = 2,816,088.42/1,820.10
  6. Step 6: Final answer
    x = 1,547.22

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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.