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Finding the Fourth Proportional to 904.14, 1,355.24 and 646.86

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Solution

The fourth proportional to 904.14, 1,355.24 and 646.86 is: 969.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.14 : 1,355.24 = 646.86 : x
  2. Step 2: Convert to fraction form
    904.14/1,355.24 = 646.86/x
  3. Step 3: Cross multiply
    904.14x = 1,355.24 × 646.86
  4. Step 4: Simplify right side
    904.14x = 876,650.55
  5. Step 5: Solve for x
    x = 876,650.55/904.14
  6. Step 6: Final answer
    x = 969.60

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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.