Home / 1,587.12-2,189.86-957.75

Finding the Fourth Proportional to 1,587.12, 2,189.86 and 957.75

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Solution

The fourth proportional to 1,587.12, 2,189.86 and 957.75 is: 1,321.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.12 : 2,189.86 = 957.75 : x
  2. Step 2: Convert to fraction form
    1,587.12/2,189.86 = 957.75/x
  3. Step 3: Cross multiply
    1,587.12x = 2,189.86 × 957.75
  4. Step 4: Simplify right side
    1,587.12x = 2,097,338.42
  5. Step 5: Solve for x
    x = 2,097,338.42/1,587.12
  6. Step 6: Final answer
    x = 1,321.47

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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.