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Finding the Fourth Proportional to 1,646.61, 2,272.21 and 900.55

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Solution

The fourth proportional to 1,646.61, 2,272.21 and 900.55 is: 1,242.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,646.61 : 2,272.21 = 900.55 : x
  2. Step 2: Convert to fraction form
    1,646.61/2,272.21 = 900.55/x
  3. Step 3: Cross multiply
    1,646.61x = 2,272.21 × 900.55
  4. Step 4: Simplify right side
    1,646.61x = 2,046,238.72
  5. Step 5: Solve for x
    x = 2,046,238.72/1,646.61
  6. Step 6: Final answer
    x = 1,242.70

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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.