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Finding the Fourth Proportional to 1,018.63, 1,528.15 and 433.63

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Solution

The fourth proportional to 1,018.63, 1,528.15 and 433.63 is: 650.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,018.63 : 1,528.15 = 433.63 : x
  2. Step 2: Convert to fraction form
    1,018.63/1,528.15 = 433.63/x
  3. Step 3: Cross multiply
    1,018.63x = 1,528.15 × 433.63
  4. Step 4: Simplify right side
    1,018.63x = 662,651.68
  5. Step 5: Solve for x
    x = 662,651.68/1,018.63
  6. Step 6: Final answer
    x = 650.53

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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.