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Finding the Fourth Proportional to 1,408.57, 2,113.47 and 484.79

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Solution

The fourth proportional to 1,408.57, 2,113.47 and 484.79 is: 727.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.57 : 2,113.47 = 484.79 : x
  2. Step 2: Convert to fraction form
    1,408.57/2,113.47 = 484.79/x
  3. Step 3: Cross multiply
    1,408.57x = 2,113.47 × 484.79
  4. Step 4: Simplify right side
    1,408.57x = 1,024,578.55
  5. Step 5: Solve for x
    x = 1,024,578.55/1,408.57
  6. Step 6: Final answer
    x = 727.39

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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.