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Finding the Fourth Proportional to 543.30, 749.69 and 307.22

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Solution

The fourth proportional to 543.30, 749.69 and 307.22 is: 423.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.30 : 749.69 = 307.22 : x
  2. Step 2: Convert to fraction form
    543.30/749.69 = 307.22/x
  3. Step 3: Cross multiply
    543.30x = 749.69 × 307.22
  4. Step 4: Simplify right side
    543.30x = 230,319.76
  5. Step 5: Solve for x
    x = 230,319.76/543.30
  6. Step 6: Final answer
    x = 423.93

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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.