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Finding the Fourth Proportional to 740.68, 1,022.22 and 475.40

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Solution

The fourth proportional to 740.68, 1,022.22 and 475.40 is: 656.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.68 : 1,022.22 = 475.40 : x
  2. Step 2: Convert to fraction form
    740.68/1,022.22 = 475.40/x
  3. Step 3: Cross multiply
    740.68x = 1,022.22 × 475.40
  4. Step 4: Simplify right side
    740.68x = 485,961.01
  5. Step 5: Solve for x
    x = 485,961.01/740.68
  6. Step 6: Final answer
    x = 656.11

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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.