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Finding the Fourth Proportional to 494.76, 683.12 and 345.70

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Solution

The fourth proportional to 494.76, 683.12 and 345.70 is: 477.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.76 : 683.12 = 345.70 : x
  2. Step 2: Convert to fraction form
    494.76/683.12 = 345.70/x
  3. Step 3: Cross multiply
    494.76x = 683.12 × 345.70
  4. Step 4: Simplify right side
    494.76x = 236,154.58
  5. Step 5: Solve for x
    x = 236,154.58/494.76
  6. Step 6: Final answer
    x = 477.31

Related Problems

Find fourth proportional to 247.38, 341.56 and 172.85
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Double scale
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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.