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Finding the Fourth Proportional to 621.91, 857.93 and 373.18

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Solution

The fourth proportional to 621.91, 857.93 and 373.18 is: 514.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.91 : 857.93 = 373.18 : x
  2. Step 2: Convert to fraction form
    621.91/857.93 = 373.18/x
  3. Step 3: Cross multiply
    621.91x = 857.93 × 373.18
  4. Step 4: Simplify right side
    621.91x = 320,162.32
  5. Step 5: Solve for x
    x = 320,162.32/621.91
  6. Step 6: Final answer
    x = 514.80

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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.