Home / 1,638.45-2,263.61-1,507.23

Finding the Fourth Proportional to 1,638.45, 2,263.61 and 1,507.23

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Solution

The fourth proportional to 1,638.45, 2,263.61 and 1,507.23 is: 2,082.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.45 : 2,263.61 = 1,507.23 : x
  2. Step 2: Convert to fraction form
    1,638.45/2,263.61 = 1,507.23/x
  3. Step 3: Cross multiply
    1,638.45x = 2,263.61 × 1,507.23
  4. Step 4: Simplify right side
    1,638.45x = 3,411,780.90
  5. Step 5: Solve for x
    x = 3,411,780.90/1,638.45
  6. Step 6: Final answer
    x = 2,082.32

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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.