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Finding the Fourth Proportional to 1,646.90, 2,272.71 and 900.87

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Solution

The fourth proportional to 1,646.90, 2,272.71 and 900.87 is: 1,243.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,646.90 : 2,272.71 = 900.87 : x
  2. Step 2: Convert to fraction form
    1,646.90/2,272.71 = 900.87/x
  3. Step 3: Cross multiply
    1,646.90x = 2,272.71 × 900.87
  4. Step 4: Simplify right side
    1,646.90x = 2,047,407.74
  5. Step 5: Solve for x
    x = 2,047,407.74/1,646.90
  6. Step 6: Final answer
    x = 1,243.19

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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.