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Finding the Fourth Proportional to 1,365.11, 1,884.63 and 900.71

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Solution

The fourth proportional to 1,365.11, 1,884.63 and 900.71 is: 1,243.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,365.11 : 1,884.63 = 900.71 : x
  2. Step 2: Convert to fraction form
    1,365.11/1,884.63 = 900.71/x
  3. Step 3: Cross multiply
    1,365.11x = 1,884.63 × 900.71
  4. Step 4: Simplify right side
    1,365.11x = 1,697,495.66
  5. Step 5: Solve for x
    x = 1,697,495.66/1,365.11
  6. Step 6: Final answer
    x = 1,243.49

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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.