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Finding the Fourth Proportional to 911.04, 1,256.92 and 701.28

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Solution

The fourth proportional to 911.04, 1,256.92 and 701.28 is: 967.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.04 : 1,256.92 = 701.28 : x
  2. Step 2: Convert to fraction form
    911.04/1,256.92 = 701.28/x
  3. Step 3: Cross multiply
    911.04x = 1,256.92 × 701.28
  4. Step 4: Simplify right side
    911.04x = 881,452.86
  5. Step 5: Solve for x
    x = 881,452.86/911.04
  6. Step 6: Final answer
    x = 967.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.