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Finding the Fourth Proportional to 1,886.49, 2,829.74 and 913.28

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Solution

The fourth proportional to 1,886.49, 2,829.74 and 913.28 is: 1,369.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,886.49 : 2,829.74 = 913.28 : x
  2. Step 2: Convert to fraction form
    1,886.49/2,829.74 = 913.28/x
  3. Step 3: Cross multiply
    1,886.49x = 2,829.74 × 913.28
  4. Step 4: Simplify right side
    1,886.49x = 2,584,326.23
  5. Step 5: Solve for x
    x = 2,584,326.23/1,886.49
  6. Step 6: Final answer
    x = 1,369.91

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.