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Finding the Fourth Proportional to 897.68, 1,240.31 and 676.25

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Solution

The fourth proportional to 897.68, 1,240.31 and 676.25 is: 934.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.68 : 1,240.31 = 676.25 : x
  2. Step 2: Convert to fraction form
    897.68/1,240.31 = 676.25/x
  3. Step 3: Cross multiply
    897.68x = 1,240.31 × 676.25
  4. Step 4: Simplify right side
    897.68x = 838,759.64
  5. Step 5: Solve for x
    x = 838,759.64/897.68
  6. Step 6: Final answer
    x = 934.36

Related Problems

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Half scale
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Double scale
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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.