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Finding the Fourth Proportional to 1,055.56, 1,581.66 and 964.36

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Solution

The fourth proportional to 1,055.56, 1,581.66 and 964.36 is: 1,445.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.56 : 1,581.66 = 964.36 : x
  2. Step 2: Convert to fraction form
    1,055.56/1,581.66 = 964.36/x
  3. Step 3: Cross multiply
    1,055.56x = 1,581.66 × 964.36
  4. Step 4: Simplify right side
    1,055.56x = 1,525,289.64
  5. Step 5: Solve for x
    x = 1,525,289.64/1,055.56
  6. Step 6: Final answer
    x = 1,445.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.