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Finding the Fourth Proportional to 1,104.19, 1,656.25 and 518.98

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Solution

The fourth proportional to 1,104.19, 1,656.25 and 518.98 is: 778.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,104.19 : 1,656.25 = 518.98 : x
  2. Step 2: Convert to fraction form
    1,104.19/1,656.25 = 518.98/x
  3. Step 3: Cross multiply
    1,104.19x = 1,656.25 × 518.98
  4. Step 4: Simplify right side
    1,104.19x = 859,555.19
  5. Step 5: Solve for x
    x = 859,555.19/1,104.19
  6. Step 6: Final answer
    x = 778.45

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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.