Home / 1,408.20-2,111.60-434.18

Finding the Fourth Proportional to 1,408.20, 2,111.60 and 434.18

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Solution

The fourth proportional to 1,408.20, 2,111.60 and 434.18 is: 651.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.20 : 2,111.60 = 434.18 : x
  2. Step 2: Convert to fraction form
    1,408.20/2,111.60 = 434.18/x
  3. Step 3: Cross multiply
    1,408.20x = 2,111.60 × 434.18
  4. Step 4: Simplify right side
    1,408.20x = 916,801.76
  5. Step 5: Solve for x
    x = 916,801.76/1,408.20
  6. Step 6: Final answer
    x = 651.05

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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.