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Finding the Fourth Proportional to 1,783.58, 2,675.69 and 613.71

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Solution

The fourth proportional to 1,783.58, 2,675.69 and 613.71 is: 920.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,783.58 : 2,675.69 = 613.71 : x
  2. Step 2: Convert to fraction form
    1,783.58/2,675.69 = 613.71/x
  3. Step 3: Cross multiply
    1,783.58x = 2,675.69 × 613.71
  4. Step 4: Simplify right side
    1,783.58x = 1,642,097.71
  5. Step 5: Solve for x
    x = 1,642,097.71/1,783.58
  6. Step 6: Final answer
    x = 920.68

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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.