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Finding the Fourth Proportional to 1,662.20, 2,293.96 and 916.28

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Solution

The fourth proportional to 1,662.20, 2,293.96 and 916.28 is: 1,264.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,662.20 : 2,293.96 = 916.28 : x
  2. Step 2: Convert to fraction form
    1,662.20/2,293.96 = 916.28/x
  3. Step 3: Cross multiply
    1,662.20x = 2,293.96 × 916.28
  4. Step 4: Simplify right side
    1,662.20x = 2,101,913.11
  5. Step 5: Solve for x
    x = 2,101,913.11/1,662.20
  6. Step 6: Final answer
    x = 1,264.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.