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Finding the Fourth Proportional to 1,316.90, 1,817.32 and 727.54

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Solution

The fourth proportional to 1,316.90, 1,817.32 and 727.54 is: 1,004.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.90 : 1,817.32 = 727.54 : x
  2. Step 2: Convert to fraction form
    1,316.90/1,817.32 = 727.54/x
  3. Step 3: Cross multiply
    1,316.90x = 1,817.32 × 727.54
  4. Step 4: Simplify right side
    1,316.90x = 1,322,172.99
  5. Step 5: Solve for x
    x = 1,322,172.99/1,316.90
  6. Step 6: Final answer
    x = 1,004.00

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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.