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Finding the Fourth Proportional to 904.89, 1,357.79 and 357.47

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Solution

The fourth proportional to 904.89, 1,357.79 and 357.47 is: 536.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.89 : 1,357.79 = 357.47 : x
  2. Step 2: Convert to fraction form
    904.89/1,357.79 = 357.47/x
  3. Step 3: Cross multiply
    904.89x = 1,357.79 × 357.47
  4. Step 4: Simplify right side
    904.89x = 485,360.62
  5. Step 5: Solve for x
    x = 485,360.62/904.89
  6. Step 6: Final answer
    x = 536.38

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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.