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Finding the Fourth Proportional to 1,231.36, 1,698.24 and 954.88

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Solution

The fourth proportional to 1,231.36, 1,698.24 and 954.88 is: 1,316.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.36 : 1,698.24 = 954.88 : x
  2. Step 2: Convert to fraction form
    1,231.36/1,698.24 = 954.88/x
  3. Step 3: Cross multiply
    1,231.36x = 1,698.24 × 954.88
  4. Step 4: Simplify right side
    1,231.36x = 1,621,615.41
  5. Step 5: Solve for x
    x = 1,621,615.41/1,231.36
  6. Step 6: Final answer
    x = 1,316.93

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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.