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Finding the Fourth Proportional to 621.88, 858.15 and 373.33

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Solution

The fourth proportional to 621.88, 858.15 and 373.33 is: 515.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.88 : 858.15 = 373.33 : x
  2. Step 2: Convert to fraction form
    621.88/858.15 = 373.33/x
  3. Step 3: Cross multiply
    621.88x = 858.15 × 373.33
  4. Step 4: Simplify right side
    621.88x = 320,373.14
  5. Step 5: Solve for x
    x = 320,373.14/621.88
  6. Step 6: Final answer
    x = 515.17

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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.