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Finding the Fourth Proportional to 621.88, 857.86 and 373.16

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Solution

The fourth proportional to 621.88, 857.86 and 373.16 is: 514.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.88 : 857.86 = 373.16 : x
  2. Step 2: Convert to fraction form
    621.88/857.86 = 373.16/x
  3. Step 3: Cross multiply
    621.88x = 857.86 × 373.16
  4. Step 4: Simplify right side
    621.88x = 320,119.04
  5. Step 5: Solve for x
    x = 320,119.04/621.88
  6. Step 6: Final answer
    x = 514.76

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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.