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Finding the Fourth Proportional to 934.74, 1,288.78 and 713.34

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Solution

The fourth proportional to 934.74, 1,288.78 and 713.34 is: 983.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.74 : 1,288.78 = 713.34 : x
  2. Step 2: Convert to fraction form
    934.74/1,288.78 = 713.34/x
  3. Step 3: Cross multiply
    934.74x = 1,288.78 × 713.34
  4. Step 4: Simplify right side
    934.74x = 919,336.54
  5. Step 5: Solve for x
    x = 919,336.54/934.74
  6. Step 6: Final answer
    x = 983.52

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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.