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Finding the Fourth Proportional to 673.53, 929.44 and 378.79

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Solution

The fourth proportional to 673.53, 929.44 and 378.79 is: 522.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.53 : 929.44 = 378.79 : x
  2. Step 2: Convert to fraction form
    673.53/929.44 = 378.79/x
  3. Step 3: Cross multiply
    673.53x = 929.44 × 378.79
  4. Step 4: Simplify right side
    673.53x = 352,065.96
  5. Step 5: Solve for x
    x = 352,065.96/673.53
  6. Step 6: Final answer
    x = 522.72

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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.