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Finding the Fourth Proportional to 1,955.78, 2,934.10 and 657.22

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Solution

The fourth proportional to 1,955.78, 2,934.10 and 657.22 is: 985.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,955.78 : 2,934.10 = 657.22 : x
  2. Step 2: Convert to fraction form
    1,955.78/2,934.10 = 657.22/x
  3. Step 3: Cross multiply
    1,955.78x = 2,934.10 × 657.22
  4. Step 4: Simplify right side
    1,955.78x = 1,928,349.20
  5. Step 5: Solve for x
    x = 1,928,349.20/1,955.78
  6. Step 6: Final answer
    x = 985.97

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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.