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Finding the Fourth Proportional to 910.66, 1,256.71 and 496.66

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Solution

The fourth proportional to 910.66, 1,256.71 and 496.66 is: 685.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.66 : 1,256.71 = 496.66 : x
  2. Step 2: Convert to fraction form
    910.66/1,256.71 = 496.66/x
  3. Step 3: Cross multiply
    910.66x = 1,256.71 × 496.66
  4. Step 4: Simplify right side
    910.66x = 624,151.96
  5. Step 5: Solve for x
    x = 624,151.96/910.66
  6. Step 6: Final answer
    x = 685.39

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Double scale
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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.