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Finding the Fourth Proportional to 910.38, 1,256.36 and 517.48

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Solution

The fourth proportional to 910.38, 1,256.36 and 517.48 is: 714.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.38 : 1,256.36 = 517.48 : x
  2. Step 2: Convert to fraction form
    910.38/1,256.36 = 517.48/x
  3. Step 3: Cross multiply
    910.38x = 1,256.36 × 517.48
  4. Step 4: Simplify right side
    910.38x = 650,141.17
  5. Step 5: Solve for x
    x = 650,141.17/910.38
  6. Step 6: Final answer
    x = 714.14

Related Problems

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Half scale
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Double scale
Find fourth proportional to 911.38, 1,257.74 and 518.48
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.