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Finding the Fourth Proportional to 621.99, 858.13 and 373.12

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Solution

The fourth proportional to 621.99, 858.13 and 373.12 is: 514.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.99 : 858.13 = 373.12 : x
  2. Step 2: Convert to fraction form
    621.99/858.13 = 373.12/x
  3. Step 3: Cross multiply
    621.99x = 858.13 × 373.12
  4. Step 4: Simplify right side
    621.99x = 320,182.39
  5. Step 5: Solve for x
    x = 320,182.39/621.99
  6. Step 6: Final answer
    x = 514.77

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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.