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Finding the Fourth Proportional to 740.72, 1,022.49 and 622.28

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Solution

The fourth proportional to 740.72, 1,022.49 and 622.28 is: 859.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.72 : 1,022.49 = 622.28 : x
  2. Step 2: Convert to fraction form
    740.72/1,022.49 = 622.28/x
  3. Step 3: Cross multiply
    740.72x = 1,022.49 × 622.28
  4. Step 4: Simplify right side
    740.72x = 636,275.08
  5. Step 5: Solve for x
    x = 636,275.08/740.72
  6. Step 6: Final answer
    x = 859.00

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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.