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Finding the Fourth Proportional to 1,343.41, 1,853.83 and 812.41

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Solution

The fourth proportional to 1,343.41, 1,853.83 and 812.41 is: 1,121.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,343.41 : 1,853.83 = 812.41 : x
  2. Step 2: Convert to fraction form
    1,343.41/1,853.83 = 812.41/x
  3. Step 3: Cross multiply
    1,343.41x = 1,853.83 × 812.41
  4. Step 4: Simplify right side
    1,343.41x = 1,506,070.03
  5. Step 5: Solve for x
    x = 1,506,070.03/1,343.41
  6. Step 6: Final answer
    x = 1,121.08

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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.