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Finding the Fourth Proportional to 904.79, 1,357.20 and 384.73

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Solution

The fourth proportional to 904.79, 1,357.20 and 384.73 is: 577.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.79 : 1,357.20 = 384.73 : x
  2. Step 2: Convert to fraction form
    904.79/1,357.20 = 384.73/x
  3. Step 3: Cross multiply
    904.79x = 1,357.20 × 384.73
  4. Step 4: Simplify right side
    904.79x = 522,146.85
  5. Step 5: Solve for x
    x = 522,146.85/904.79
  6. Step 6: Final answer
    x = 577.09

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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.