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Finding the Fourth Proportional to 622.36, 857.40 and 512.47

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Solution

The fourth proportional to 622.36, 857.40 and 512.47 is: 706.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.36 : 857.40 = 512.47 : x
  2. Step 2: Convert to fraction form
    622.36/857.40 = 512.47/x
  3. Step 3: Cross multiply
    622.36x = 857.40 × 512.47
  4. Step 4: Simplify right side
    622.36x = 439,387.49
  5. Step 5: Solve for x
    x = 439,387.49/622.36
  6. Step 6: Final answer
    x = 706.01

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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.