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Finding the Fourth Proportional to 1,018.92, 1,528.14 and 369.80

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Solution

The fourth proportional to 1,018.92, 1,528.14 and 369.80 is: 554.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,018.92 : 1,528.14 = 369.80 : x
  2. Step 2: Convert to fraction form
    1,018.92/1,528.14 = 369.80/x
  3. Step 3: Cross multiply
    1,018.92x = 1,528.14 × 369.80
  4. Step 4: Simplify right side
    1,018.92x = 565,106.17
  5. Step 5: Solve for x
    x = 565,106.17/1,018.92
  6. Step 6: Final answer
    x = 554.61

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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.