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Finding the Fourth Proportional to 1,018.09, 1,527.14 and 287.67

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Solution

The fourth proportional to 1,018.09, 1,527.14 and 287.67 is: 431.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,018.09 : 1,527.14 = 287.67 : x
  2. Step 2: Convert to fraction form
    1,018.09/1,527.14 = 287.67/x
  3. Step 3: Cross multiply
    1,018.09x = 1,527.14 × 287.67
  4. Step 4: Simplify right side
    1,018.09x = 439,303.29
  5. Step 5: Solve for x
    x = 439,303.29/1,018.09
  6. Step 6: Final answer
    x = 431.50

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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.