Home / 1,386.26-1,912.58-914.39

Finding the Fourth Proportional to 1,386.26, 1,912.58 and 914.39

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Solution

The fourth proportional to 1,386.26, 1,912.58 and 914.39 is: 1,261.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.26 : 1,912.58 = 914.39 : x
  2. Step 2: Convert to fraction form
    1,386.26/1,912.58 = 914.39/x
  3. Step 3: Cross multiply
    1,386.26x = 1,912.58 × 914.39
  4. Step 4: Simplify right side
    1,386.26x = 1,748,848.38
  5. Step 5: Solve for x
    x = 1,748,848.38/1,386.26
  6. Step 6: Final answer
    x = 1,261.56

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.