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Finding the Fourth Proportional to 1,903.96, 2,856.30 and 605.17

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Solution

The fourth proportional to 1,903.96, 2,856.30 and 605.17 is: 907.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,903.96 : 2,856.30 = 605.17 : x
  2. Step 2: Convert to fraction form
    1,903.96/2,856.30 = 605.17/x
  3. Step 3: Cross multiply
    1,903.96x = 2,856.30 × 605.17
  4. Step 4: Simplify right side
    1,903.96x = 1,728,547.07
  5. Step 5: Solve for x
    x = 1,728,547.07/1,903.96
  6. Step 6: Final answer
    x = 907.87

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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.