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Finding the Fourth Proportional to 1,018.24, 1,405.20 and 604.24

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Solution

The fourth proportional to 1,018.24, 1,405.20 and 604.24 is: 833.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,018.24 : 1,405.20 = 604.24 : x
  2. Step 2: Convert to fraction form
    1,018.24/1,405.20 = 604.24/x
  3. Step 3: Cross multiply
    1,018.24x = 1,405.20 × 604.24
  4. Step 4: Simplify right side
    1,018.24x = 849,078.05
  5. Step 5: Solve for x
    x = 849,078.05/1,018.24
  6. Step 6: Final answer
    x = 833.87

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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.