Home / 1,408.21-2,112.55-434.25

Finding the Fourth Proportional to 1,408.21, 2,112.55 and 434.25

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Solution

The fourth proportional to 1,408.21, 2,112.55 and 434.25 is: 651.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.21 : 2,112.55 = 434.25 : x
  2. Step 2: Convert to fraction form
    1,408.21/2,112.55 = 434.25/x
  3. Step 3: Cross multiply
    1,408.21x = 2,112.55 × 434.25
  4. Step 4: Simplify right side
    1,408.21x = 917,373.75
  5. Step 5: Solve for x
    x = 917,373.75/1,408.21
  6. Step 6: Final answer
    x = 651.45

Related Problems

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Double scale
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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.