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Finding the Fourth Proportional to 1,365.21, 1,882.49 and 922.34

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Solution

The fourth proportional to 1,365.21, 1,882.49 and 922.34 is: 1,271.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,365.21 : 1,882.49 = 922.34 : x
  2. Step 2: Convert to fraction form
    1,365.21/1,882.49 = 922.34/x
  3. Step 3: Cross multiply
    1,365.21x = 1,882.49 × 922.34
  4. Step 4: Simplify right side
    1,365.21x = 1,736,281.80
  5. Step 5: Solve for x
    x = 1,736,281.80/1,365.21
  6. Step 6: Final answer
    x = 1,271.81

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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.