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Finding the Fourth Proportional to 910.36, 1,256.38 and 517.48

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Solution

The fourth proportional to 910.36, 1,256.38 and 517.48 is: 714.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.36 : 1,256.38 = 517.48 : x
  2. Step 2: Convert to fraction form
    910.36/1,256.38 = 517.48/x
  3. Step 3: Cross multiply
    910.36x = 1,256.38 × 517.48
  4. Step 4: Simplify right side
    910.36x = 650,151.52
  5. Step 5: Solve for x
    x = 650,151.52/910.36
  6. Step 6: Final answer
    x = 714.17

Related Problems

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Half scale
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Double scale
Find fourth proportional to 911.36, 1,257.76 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.