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Finding the Fourth Proportional to 673.16, 928.98 and 393.57

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Solution

The fourth proportional to 673.16, 928.98 and 393.57 is: 543.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.16 : 928.98 = 393.57 : x
  2. Step 2: Convert to fraction form
    673.16/928.98 = 393.57/x
  3. Step 3: Cross multiply
    673.16x = 928.98 × 393.57
  4. Step 4: Simplify right side
    673.16x = 365,618.66
  5. Step 5: Solve for x
    x = 365,618.66/673.16
  6. Step 6: Final answer
    x = 543.14

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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.