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Finding the Fourth Proportional to 621.92, 858.25 and 373.25

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Solution

The fourth proportional to 621.92, 858.25 and 373.25 is: 515.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.92 : 858.25 = 373.25 : x
  2. Step 2: Convert to fraction form
    621.92/858.25 = 373.25/x
  3. Step 3: Cross multiply
    621.92x = 858.25 × 373.25
  4. Step 4: Simplify right side
    621.92x = 320,341.81
  5. Step 5: Solve for x
    x = 320,341.81/621.92
  6. Step 6: Final answer
    x = 515.09

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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.