Home / 1,406.20-2,109.21-432.25

Finding the Fourth Proportional to 1,406.20, 2,109.21 and 432.25

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Solution

The fourth proportional to 1,406.20, 2,109.21 and 432.25 is: 648.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,406.20 : 2,109.21 = 432.25 : x
  2. Step 2: Convert to fraction form
    1,406.20/2,109.21 = 432.25/x
  3. Step 3: Cross multiply
    1,406.20x = 2,109.21 × 432.25
  4. Step 4: Simplify right side
    1,406.20x = 911,706.02
  5. Step 5: Solve for x
    x = 911,706.02/1,406.20
  6. Step 6: Final answer
    x = 648.35

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1.5x scale

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.