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Finding the Fourth Proportional to 1,170.08, 1,754.52 and 389.80

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Solution

The fourth proportional to 1,170.08, 1,754.52 and 389.80 is: 584.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,170.08 : 1,754.52 = 389.80 : x
  2. Step 2: Convert to fraction form
    1,170.08/1,754.52 = 389.80/x
  3. Step 3: Cross multiply
    1,170.08x = 1,754.52 × 389.80
  4. Step 4: Simplify right side
    1,170.08x = 683,907.51
  5. Step 5: Solve for x
    x = 683,907.51/1,170.08
  6. Step 6: Final answer
    x = 584.50

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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.