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Finding the Fourth Proportional to 953.50, 1,316.37 and 720.22

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Solution

The fourth proportional to 953.50, 1,316.37 and 720.22 is: 994.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.50 : 1,316.37 = 720.22 : x
  2. Step 2: Convert to fraction form
    953.50/1,316.37 = 720.22/x
  3. Step 3: Cross multiply
    953.50x = 1,316.37 × 720.22
  4. Step 4: Simplify right side
    953.50x = 948,076.00
  5. Step 5: Solve for x
    x = 948,076.00/953.50
  6. Step 6: Final answer
    x = 994.31

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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.