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Finding the Fourth Proportional to 1,445.99, 1,995.54 and 816.45

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Solution

The fourth proportional to 1,445.99, 1,995.54 and 816.45 is: 1,126.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,445.99 : 1,995.54 = 816.45 : x
  2. Step 2: Convert to fraction form
    1,445.99/1,995.54 = 816.45/x
  3. Step 3: Cross multiply
    1,445.99x = 1,995.54 × 816.45
  4. Step 4: Simplify right side
    1,445.99x = 1,629,258.63
  5. Step 5: Solve for x
    x = 1,629,258.63/1,445.99
  6. Step 6: Final answer
    x = 1,126.75

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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.