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Finding the Fourth Proportional to 1,903.68, 2,855.48 and 605.15

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Solution

The fourth proportional to 1,903.68, 2,855.48 and 605.15 is: 907.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,903.68 : 2,855.48 = 605.15 : x
  2. Step 2: Convert to fraction form
    1,903.68/2,855.48 = 605.15/x
  3. Step 3: Cross multiply
    1,903.68x = 2,855.48 × 605.15
  4. Step 4: Simplify right side
    1,903.68x = 1,727,980.96
  5. Step 5: Solve for x
    x = 1,727,980.96/1,903.68
  6. Step 6: Final answer
    x = 907.71

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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.