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Finding the Fourth Proportional to 1,945.54, 2,918.32 and 558.90

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Solution

The fourth proportional to 1,945.54, 2,918.32 and 558.90 is: 838.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,945.54 : 2,918.32 = 558.90 : x
  2. Step 2: Convert to fraction form
    1,945.54/2,918.32 = 558.90/x
  3. Step 3: Cross multiply
    1,945.54x = 2,918.32 × 558.90
  4. Step 4: Simplify right side
    1,945.54x = 1,631,049.05
  5. Step 5: Solve for x
    x = 1,631,049.05/1,945.54
  6. Step 6: Final answer
    x = 838.35

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1.5x scale

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.