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Finding the Fourth Proportional to 1,323.65, 1,985.58 and 349.75

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Solution

The fourth proportional to 1,323.65, 1,985.58 and 349.75 is: 524.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,323.65 : 1,985.58 = 349.75 : x
  2. Step 2: Convert to fraction form
    1,323.65/1,985.58 = 349.75/x
  3. Step 3: Cross multiply
    1,323.65x = 1,985.58 × 349.75
  4. Step 4: Simplify right side
    1,323.65x = 694,456.61
  5. Step 5: Solve for x
    x = 694,456.61/1,323.65
  6. Step 6: Final answer
    x = 524.65

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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.