Home / 1,018.21-1,527.60-287.79

Finding the Fourth Proportional to 1,018.21, 1,527.60 and 287.79

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Solution

The fourth proportional to 1,018.21, 1,527.60 and 287.79 is: 431.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,018.21 : 1,527.60 = 287.79 : x
  2. Step 2: Convert to fraction form
    1,018.21/1,527.60 = 287.79/x
  3. Step 3: Cross multiply
    1,018.21x = 1,527.60 × 287.79
  4. Step 4: Simplify right side
    1,018.21x = 439,628.00
  5. Step 5: Solve for x
    x = 439,628.00/1,018.21
  6. Step 6: Final answer
    x = 431.77

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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.