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Finding the Fourth Proportional to 673.61, 929.57 and 378.86

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Solution

The fourth proportional to 673.61, 929.57 and 378.86 is: 522.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.61 : 929.57 = 378.86 : x
  2. Step 2: Convert to fraction form
    673.61/929.57 = 378.86/x
  3. Step 3: Cross multiply
    673.61x = 929.57 × 378.86
  4. Step 4: Simplify right side
    673.61x = 352,177.32
  5. Step 5: Solve for x
    x = 352,177.32/673.61
  6. Step 6: Final answer
    x = 522.82

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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.