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Finding the Fourth Proportional to 1,071.19, 1,477.73 and 673.35

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Solution

The fourth proportional to 1,071.19, 1,477.73 and 673.35 is: 928.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,071.19 : 1,477.73 = 673.35 : x
  2. Step 2: Convert to fraction form
    1,071.19/1,477.73 = 673.35/x
  3. Step 3: Cross multiply
    1,071.19x = 1,477.73 × 673.35
  4. Step 4: Simplify right side
    1,071.19x = 995,021.85
  5. Step 5: Solve for x
    x = 995,021.85/1,071.19
  6. Step 6: Final answer
    x = 928.89

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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.