Home / 1,907.16-2,631.98-1,121.32

Finding the Fourth Proportional to 1,907.16, 2,631.98 and 1,121.32

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Solution

The fourth proportional to 1,907.16, 2,631.98 and 1,121.32 is: 1,547.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,907.16 : 2,631.98 = 1,121.32 : x
  2. Step 2: Convert to fraction form
    1,907.16/2,631.98 = 1,121.32/x
  3. Step 3: Cross multiply
    1,907.16x = 2,631.98 × 1,121.32
  4. Step 4: Simplify right side
    1,907.16x = 2,951,291.81
  5. Step 5: Solve for x
    x = 2,951,291.81/1,907.16
  6. Step 6: Final answer
    x = 1,547.48

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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.