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Finding the Fourth Proportional to 1,422.76, 1,962.66 and 957.16

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Solution

The fourth proportional to 1,422.76, 1,962.66 and 957.16 is: 1,320.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.76 : 1,962.66 = 957.16 : x
  2. Step 2: Convert to fraction form
    1,422.76/1,962.66 = 957.16/x
  3. Step 3: Cross multiply
    1,422.76x = 1,962.66 × 957.16
  4. Step 4: Simplify right side
    1,422.76x = 1,878,579.65
  5. Step 5: Solve for x
    x = 1,878,579.65/1,422.76
  6. Step 6: Final answer
    x = 1,320.38

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1.5x scale

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.