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Finding the Fourth Proportional to 451.32, 621.93 and 320.10

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Solution

The fourth proportional to 451.32, 621.93 and 320.10 is: 441.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.32 : 621.93 = 320.10 : x
  2. Step 2: Convert to fraction form
    451.32/621.93 = 320.10/x
  3. Step 3: Cross multiply
    451.32x = 621.93 × 320.10
  4. Step 4: Simplify right side
    451.32x = 199,079.79
  5. Step 5: Solve for x
    x = 199,079.79/451.32
  6. Step 6: Final answer
    x = 441.11

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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.