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Finding the Fourth Proportional to 970.81, 1,456.36 and 450.86

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Solution

The fourth proportional to 970.81, 1,456.36 and 450.86 is: 676.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.81 : 1,456.36 = 450.86 : x
  2. Step 2: Convert to fraction form
    970.81/1,456.36 = 450.86/x
  3. Step 3: Cross multiply
    970.81x = 1,456.36 × 450.86
  4. Step 4: Simplify right side
    970.81x = 656,612.22
  5. Step 5: Solve for x
    x = 656,612.22/970.81
  6. Step 6: Final answer
    x = 676.36

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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.