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Finding the Fourth Proportional to 676.75, 934.20 and 455.28

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Solution

The fourth proportional to 676.75, 934.20 and 455.28 is: 628.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.75 : 934.20 = 455.28 : x
  2. Step 2: Convert to fraction form
    676.75/934.20 = 455.28/x
  3. Step 3: Cross multiply
    676.75x = 934.20 × 455.28
  4. Step 4: Simplify right side
    676.75x = 425,322.58
  5. Step 5: Solve for x
    x = 425,322.58/676.75
  6. Step 6: Final answer
    x = 628.48

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Find fourth proportional to 338.38, 467.10 and 227.64
Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.