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Finding the Fourth Proportional to 543.51, 749.79 and 310.50

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Solution

The fourth proportional to 543.51, 749.79 and 310.50 is: 428.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.51 : 749.79 = 310.50 : x
  2. Step 2: Convert to fraction form
    543.51/749.79 = 310.50/x
  3. Step 3: Cross multiply
    543.51x = 749.79 × 310.50
  4. Step 4: Simplify right side
    543.51x = 232,809.80
  5. Step 5: Solve for x
    x = 232,809.80/543.51
  6. Step 6: Final answer
    x = 428.35

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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.