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Finding the Fourth Proportional to 1,425.47, 1,966.26 and 865.39

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Solution

The fourth proportional to 1,425.47, 1,966.26 and 865.39 is: 1,193.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.47 : 1,966.26 = 865.39 : x
  2. Step 2: Convert to fraction form
    1,425.47/1,966.26 = 865.39/x
  3. Step 3: Cross multiply
    1,425.47x = 1,966.26 × 865.39
  4. Step 4: Simplify right side
    1,425.47x = 1,701,577.41
  5. Step 5: Solve for x
    x = 1,701,577.41/1,425.47
  6. Step 6: Final answer
    x = 1,193.70

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.