Home / 1,441.36-1,989.30-918.64

Finding the Fourth Proportional to 1,441.36, 1,989.30 and 918.64

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Solution

The fourth proportional to 1,441.36, 1,989.30 and 918.64 is: 1,267.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,441.36 : 1,989.30 = 918.64 : x
  2. Step 2: Convert to fraction form
    1,441.36/1,989.30 = 918.64/x
  3. Step 3: Cross multiply
    1,441.36x = 1,989.30 × 918.64
  4. Step 4: Simplify right side
    1,441.36x = 1,827,450.55
  5. Step 5: Solve for x
    x = 1,827,450.55/1,441.36
  6. Step 6: Final answer
    x = 1,267.87

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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.