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Finding the Fourth Proportional to 1,355.04, 2,035.80 and 869.04

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Solution

The fourth proportional to 1,355.04, 2,035.80 and 869.04 is: 1,305.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.04 : 2,035.80 = 869.04 : x
  2. Step 2: Convert to fraction form
    1,355.04/2,035.80 = 869.04/x
  3. Step 3: Cross multiply
    1,355.04x = 2,035.80 × 869.04
  4. Step 4: Simplify right side
    1,355.04x = 1,769,191.63
  5. Step 5: Solve for x
    x = 1,769,191.63/1,355.04
  6. Step 6: Final answer
    x = 1,305.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.