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Finding the Fourth Proportional to 1,904.25, 2,856.40 and 671.68

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Solution

The fourth proportional to 1,904.25, 2,856.40 and 671.68 is: 1,007.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,904.25 : 2,856.40 = 671.68 : x
  2. Step 2: Convert to fraction form
    1,904.25/2,856.40 = 671.68/x
  3. Step 3: Cross multiply
    1,904.25x = 2,856.40 × 671.68
  4. Step 4: Simplify right side
    1,904.25x = 1,918,588.64
  5. Step 5: Solve for x
    x = 1,918,588.64/1,904.25
  6. Step 6: Final answer
    x = 1,007.53

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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.