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Finding the Fourth Proportional to 904.99, 1,357.69 and 349.78

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Solution

The fourth proportional to 904.99, 1,357.69 and 349.78 is: 524.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.99 : 1,357.69 = 349.78 : x
  2. Step 2: Convert to fraction form
    904.99/1,357.69 = 349.78/x
  3. Step 3: Cross multiply
    904.99x = 1,357.69 × 349.78
  4. Step 4: Simplify right side
    904.99x = 474,888.54
  5. Step 5: Solve for x
    x = 474,888.54/904.99
  6. Step 6: Final answer
    x = 524.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.