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Finding the Fourth Proportional to 1,856.40, 2,782.96 and 930.63

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Solution

The fourth proportional to 1,856.40, 2,782.96 and 930.63 is: 1,395.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,856.40 : 2,782.96 = 930.63 : x
  2. Step 2: Convert to fraction form
    1,856.40/2,782.96 = 930.63/x
  3. Step 3: Cross multiply
    1,856.40x = 2,782.96 × 930.63
  4. Step 4: Simplify right side
    1,856.40x = 2,589,914.17
  5. Step 5: Solve for x
    x = 2,589,914.17/1,856.40
  6. Step 6: Final answer
    x = 1,395.13

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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.