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Finding the Fourth Proportional to 904.52, 1,355.80 and 442.61

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Solution

The fourth proportional to 904.52, 1,355.80 and 442.61 is: 663.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.52 : 1,355.80 = 442.61 : x
  2. Step 2: Convert to fraction form
    904.52/1,355.80 = 442.61/x
  3. Step 3: Cross multiply
    904.52x = 1,355.80 × 442.61
  4. Step 4: Simplify right side
    904.52x = 600,090.64
  5. Step 5: Solve for x
    x = 600,090.64/904.52
  6. Step 6: Final answer
    x = 663.44

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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.