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Finding the Fourth Proportional to 914.12, 1,260.28 and 674.72

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Solution

The fourth proportional to 914.12, 1,260.28 and 674.72 is: 930.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.12 : 1,260.28 = 674.72 : x
  2. Step 2: Convert to fraction form
    914.12/1,260.28 = 674.72/x
  3. Step 3: Cross multiply
    914.12x = 1,260.28 × 674.72
  4. Step 4: Simplify right side
    914.12x = 850,336.12
  5. Step 5: Solve for x
    x = 850,336.12/914.12
  6. Step 6: Final answer
    x = 930.22

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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.