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Finding the Fourth Proportional to 543.98, 750.68 and 307.91

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Solution

The fourth proportional to 543.98, 750.68 and 307.91 is: 424.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.98 : 750.68 = 307.91 : x
  2. Step 2: Convert to fraction form
    543.98/750.68 = 307.91/x
  3. Step 3: Cross multiply
    543.98x = 750.68 × 307.91
  4. Step 4: Simplify right side
    543.98x = 231,136.59
  5. Step 5: Solve for x
    x = 231,136.59/543.98
  6. Step 6: Final answer
    x = 424.90

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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.