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Finding the Fourth Proportional to 673.58, 929.49 and 378.79

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Solution

The fourth proportional to 673.58, 929.49 and 378.79 is: 522.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.58 : 929.49 = 378.79 : x
  2. Step 2: Convert to fraction form
    673.58/929.49 = 378.79/x
  3. Step 3: Cross multiply
    673.58x = 929.49 × 378.79
  4. Step 4: Simplify right side
    673.58x = 352,081.52
  5. Step 5: Solve for x
    x = 352,081.52/673.58
  6. Step 6: Final answer
    x = 522.70

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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.