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Finding the Fourth Proportional to 910.77, 1,256.57 and 537.88

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Solution

The fourth proportional to 910.77, 1,256.57 and 537.88 is: 742.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.77 : 1,256.57 = 537.88 : x
  2. Step 2: Convert to fraction form
    910.77/1,256.57 = 537.88/x
  3. Step 3: Cross multiply
    910.77x = 1,256.57 × 537.88
  4. Step 4: Simplify right side
    910.77x = 675,882.07
  5. Step 5: Solve for x
    x = 675,882.07/910.77
  6. Step 6: Final answer
    x = 742.10

Related Problems

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Half scale
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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.