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Finding the Fourth Proportional to 1,036.36, 1,555.11 and 805.71

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Solution

The fourth proportional to 1,036.36, 1,555.11 and 805.71 is: 1,209.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.36 : 1,555.11 = 805.71 : x
  2. Step 2: Convert to fraction form
    1,036.36/1,555.11 = 805.71/x
  3. Step 3: Cross multiply
    1,036.36x = 1,555.11 × 805.71
  4. Step 4: Simplify right side
    1,036.36x = 1,252,967.68
  5. Step 5: Solve for x
    x = 1,252,967.68/1,036.36
  6. Step 6: Final answer
    x = 1,209.01

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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.