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Finding the Fourth Proportional to 543.46, 749.99 and 307.42

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Solution

The fourth proportional to 543.46, 749.99 and 307.42 is: 424.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.46 : 749.99 = 307.42 : x
  2. Step 2: Convert to fraction form
    543.46/749.99 = 307.42/x
  3. Step 3: Cross multiply
    543.46x = 749.99 × 307.42
  4. Step 4: Simplify right side
    543.46x = 230,561.93
  5. Step 5: Solve for x
    x = 230,561.93/543.46
  6. Step 6: Final answer
    x = 424.25

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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.