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Finding the Fourth Proportional to 673.63, 929.63 and 378.89

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Solution

The fourth proportional to 673.63, 929.63 and 378.89 is: 522.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.63 : 929.63 = 378.89 : x
  2. Step 2: Convert to fraction form
    673.63/929.63 = 378.89/x
  3. Step 3: Cross multiply
    673.63x = 929.63 × 378.89
  4. Step 4: Simplify right side
    673.63x = 352,227.51
  5. Step 5: Solve for x
    x = 352,227.51/673.63
  6. Step 6: Final answer
    x = 522.88

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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.