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Finding the Fourth Proportional to 543.38, 749.76 and 322.28

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Solution

The fourth proportional to 543.38, 749.76 and 322.28 is: 444.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.38 : 749.76 = 322.28 : x
  2. Step 2: Convert to fraction form
    543.38/749.76 = 322.28/x
  3. Step 3: Cross multiply
    543.38x = 749.76 × 322.28
  4. Step 4: Simplify right side
    543.38x = 241,628.90
  5. Step 5: Solve for x
    x = 241,628.90/543.38
  6. Step 6: Final answer
    x = 444.68

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1.5x scale

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.