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Finding the Fourth Proportional to 852.40, 1,175.80 and 619.12

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Solution

The fourth proportional to 852.40, 1,175.80 and 619.12 is: 854.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    852.40 : 1,175.80 = 619.12 : x
  2. Step 2: Convert to fraction form
    852.40/1,175.80 = 619.12/x
  3. Step 3: Cross multiply
    852.40x = 1,175.80 × 619.12
  4. Step 4: Simplify right side
    852.40x = 727,961.30
  5. Step 5: Solve for x
    x = 727,961.30/852.40
  6. Step 6: Final answer
    x = 854.01

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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.