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Finding the Fourth Proportional to 941.31, 1,299.66 and 705.78

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Solution

The fourth proportional to 941.31, 1,299.66 and 705.78 is: 974.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.31 : 1,299.66 = 705.78 : x
  2. Step 2: Convert to fraction form
    941.31/1,299.66 = 705.78/x
  3. Step 3: Cross multiply
    941.31x = 1,299.66 × 705.78
  4. Step 4: Simplify right side
    941.31x = 917,274.03
  5. Step 5: Solve for x
    x = 917,274.03/941.31
  6. Step 6: Final answer
    x = 974.47

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.