Home / 1,638.40-2,259.30-1,602.64

Finding the Fourth Proportional to 1,638.40, 2,259.30 and 1,602.64

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Solution

The fourth proportional to 1,638.40, 2,259.30 and 1,602.64 is: 2,209.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.40 : 2,259.30 = 1,602.64 : x
  2. Step 2: Convert to fraction form
    1,638.40/2,259.30 = 1,602.64/x
  3. Step 3: Cross multiply
    1,638.40x = 2,259.30 × 1,602.64
  4. Step 4: Simplify right side
    1,638.40x = 3,620,844.55
  5. Step 5: Solve for x
    x = 3,620,844.55/1,638.40
  6. Step 6: Final answer
    x = 2,209.99

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1.5x scale

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.