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Finding the Fourth Proportional to 910.76, 1,256.84 and 496.76

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Solution

The fourth proportional to 910.76, 1,256.84 and 496.76 is: 685.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.76 : 1,256.84 = 496.76 : x
  2. Step 2: Convert to fraction form
    910.76/1,256.84 = 496.76/x
  3. Step 3: Cross multiply
    910.76x = 1,256.84 × 496.76
  4. Step 4: Simplify right side
    910.76x = 624,347.84
  5. Step 5: Solve for x
    x = 624,347.84/910.76
  6. Step 6: Final answer
    x = 685.52

Related Problems

Find fourth proportional to 455.38, 628.42 and 248.38
Half scale
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Double scale
Find fourth proportional to 911.76, 1,258.22 and 497.76
Similar ratio
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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.