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Finding the Fourth Proportional to 1,328.77, 1,834.01 and 862.21

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Solution

The fourth proportional to 1,328.77, 1,834.01 and 862.21 is: 1,190.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.77 : 1,834.01 = 862.21 : x
  2. Step 2: Convert to fraction form
    1,328.77/1,834.01 = 862.21/x
  3. Step 3: Cross multiply
    1,328.77x = 1,834.01 × 862.21
  4. Step 4: Simplify right side
    1,328.77x = 1,581,301.76
  5. Step 5: Solve for x
    x = 1,581,301.76/1,328.77
  6. Step 6: Final answer
    x = 1,190.05

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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.