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Finding the Fourth Proportional to 1,313.78, 1,813.10 and 754.43

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Solution

The fourth proportional to 1,313.78, 1,813.10 and 754.43 is: 1,041.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,313.78 : 1,813.10 = 754.43 : x
  2. Step 2: Convert to fraction form
    1,313.78/1,813.10 = 754.43/x
  3. Step 3: Cross multiply
    1,313.78x = 1,813.10 × 754.43
  4. Step 4: Simplify right side
    1,313.78x = 1,367,844.20
  5. Step 5: Solve for x
    x = 1,367,844.20/1,313.78
  6. Step 6: Final answer
    x = 1,041.16

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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.