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Finding the Fourth Proportional to 910.52, 1,256.45 and 556.41

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Solution

The fourth proportional to 910.52, 1,256.45 and 556.41 is: 767.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.52 : 1,256.45 = 556.41 : x
  2. Step 2: Convert to fraction form
    910.52/1,256.45 = 556.41/x
  3. Step 3: Cross multiply
    910.52x = 1,256.45 × 556.41
  4. Step 4: Simplify right side
    910.52x = 699,101.34
  5. Step 5: Solve for x
    x = 699,101.34/910.52
  6. Step 6: Final answer
    x = 767.80

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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.