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Finding the Fourth Proportional to 673.40, 929.30 and 505.04

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Solution

The fourth proportional to 673.40, 929.30 and 505.04 is: 696.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.40 : 929.30 = 505.04 : x
  2. Step 2: Convert to fraction form
    673.40/929.30 = 505.04/x
  3. Step 3: Cross multiply
    673.40x = 929.30 × 505.04
  4. Step 4: Simplify right side
    673.40x = 469,333.47
  5. Step 5: Solve for x
    x = 469,333.47/673.40
  6. Step 6: Final answer
    x = 696.96

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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.