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Finding the Fourth Proportional to 673.74, 929.48 and 393.89

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Solution

The fourth proportional to 673.74, 929.48 and 393.89 is: 543.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.74 : 929.48 = 393.89 : x
  2. Step 2: Convert to fraction form
    673.74/929.48 = 393.89/x
  3. Step 3: Cross multiply
    673.74x = 929.48 × 393.89
  4. Step 4: Simplify right side
    673.74x = 366,106.26
  5. Step 5: Solve for x
    x = 366,106.26/673.74
  6. Step 6: Final answer
    x = 543.39

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.