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Finding the Fourth Proportional to 1,036.84, 1,555.40 and 306.43

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Solution

The fourth proportional to 1,036.84, 1,555.40 and 306.43 is: 459.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.84 : 1,555.40 = 306.43 : x
  2. Step 2: Convert to fraction form
    1,036.84/1,555.40 = 306.43/x
  3. Step 3: Cross multiply
    1,036.84x = 1,555.40 × 306.43
  4. Step 4: Simplify right side
    1,036.84x = 476,613.45
  5. Step 5: Solve for x
    x = 476,613.45/1,036.84
  6. Step 6: Final answer
    x = 459.68

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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.