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Finding the Fourth Proportional to 630.64, 864.27 and 622.49

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Solution

The fourth proportional to 630.64, 864.27 and 622.49 is: 853.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.64 : 864.27 = 622.49 : x
  2. Step 2: Convert to fraction form
    630.64/864.27 = 622.49/x
  3. Step 3: Cross multiply
    630.64x = 864.27 × 622.49
  4. Step 4: Simplify right side
    630.64x = 537,995.11
  5. Step 5: Solve for x
    x = 537,995.11/630.64
  6. Step 6: Final answer
    x = 853.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.