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Finding the Fourth Proportional to 1,551.75, 2,141.97 and 930.75

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Solution

The fourth proportional to 1,551.75, 2,141.97 and 930.75 is: 1,284.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.75 : 2,141.97 = 930.75 : x
  2. Step 2: Convert to fraction form
    1,551.75/2,141.97 = 930.75/x
  3. Step 3: Cross multiply
    1,551.75x = 2,141.97 × 930.75
  4. Step 4: Simplify right side
    1,551.75x = 1,993,638.58
  5. Step 5: Solve for x
    x = 1,993,638.58/1,551.75
  6. Step 6: Final answer
    x = 1,284.77

Related Problems

Find fourth proportional to 775.88, 1,070.99 and 465.38
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.