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Finding the Fourth Proportional to 673.06, 928.77 and 378.31

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Solution

The fourth proportional to 673.06, 928.77 and 378.31 is: 522.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.06 : 928.77 = 378.31 : x
  2. Step 2: Convert to fraction form
    673.06/928.77 = 378.31/x
  3. Step 3: Cross multiply
    673.06x = 928.77 × 378.31
  4. Step 4: Simplify right side
    673.06x = 351,362.98
  5. Step 5: Solve for x
    x = 351,362.98/673.06
  6. Step 6: Final answer
    x = 522.04

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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.