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Finding the Fourth Proportional to 357.05, 492.46 and 307.34

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Solution

The fourth proportional to 357.05, 492.46 and 307.34 is: 423.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.05 : 492.46 = 307.34 : x
  2. Step 2: Convert to fraction form
    357.05/492.46 = 307.34/x
  3. Step 3: Cross multiply
    357.05x = 492.46 × 307.34
  4. Step 4: Simplify right side
    357.05x = 151,349.89
  5. Step 5: Solve for x
    x = 151,349.89/357.05
  6. Step 6: Final answer
    x = 423.89

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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.