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Finding the Fourth Proportional to 1,323.69, 1,985.61 and 349.77

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Solution

The fourth proportional to 1,323.69, 1,985.61 and 349.77 is: 524.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,323.69 : 1,985.61 = 349.77 : x
  2. Step 2: Convert to fraction form
    1,323.69/1,985.61 = 349.77/x
  3. Step 3: Cross multiply
    1,323.69x = 1,985.61 × 349.77
  4. Step 4: Simplify right side
    1,323.69x = 694,506.81
  5. Step 5: Solve for x
    x = 694,506.81/1,323.69
  6. Step 6: Final answer
    x = 524.67

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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.