Home / 1,205.12-1,806.40-435.04

Finding the Fourth Proportional to 1,205.12, 1,806.40 and 435.04

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Solution

The fourth proportional to 1,205.12, 1,806.40 and 435.04 is: 652.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,205.12 : 1,806.40 = 435.04 : x
  2. Step 2: Convert to fraction form
    1,205.12/1,806.40 = 435.04/x
  3. Step 3: Cross multiply
    1,205.12x = 1,806.40 × 435.04
  4. Step 4: Simplify right side
    1,205.12x = 785,856.26
  5. Step 5: Solve for x
    x = 785,856.26/1,205.12
  6. Step 6: Final answer
    x = 652.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.