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Finding the Fourth Proportional to 622.98, 857.75 and 529.58

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Solution

The fourth proportional to 622.98, 857.75 and 529.58 is: 729.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.98 : 857.75 = 529.58 : x
  2. Step 2: Convert to fraction form
    622.98/857.75 = 529.58/x
  3. Step 3: Cross multiply
    622.98x = 857.75 × 529.58
  4. Step 4: Simplify right side
    622.98x = 454,242.29
  5. Step 5: Solve for x
    x = 454,242.29/622.98
  6. Step 6: Final answer
    x = 729.14

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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.