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Finding the Fourth Proportional to 1,860.07, 2,790.60 and 561.58

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Solution

The fourth proportional to 1,860.07, 2,790.60 and 561.58 is: 842.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,860.07 : 2,790.60 = 561.58 : x
  2. Step 2: Convert to fraction form
    1,860.07/2,790.60 = 561.58/x
  3. Step 3: Cross multiply
    1,860.07x = 2,790.60 × 561.58
  4. Step 4: Simplify right side
    1,860.07x = 1,567,145.15
  5. Step 5: Solve for x
    x = 1,567,145.15/1,860.07
  6. Step 6: Final answer
    x = 842.52

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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.