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Finding the Fourth Proportional to 543.18, 749.68 and 403.46

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Solution

The fourth proportional to 543.18, 749.68 and 403.46 is: 556.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.18 : 749.68 = 403.46 : x
  2. Step 2: Convert to fraction form
    543.18/749.68 = 403.46/x
  3. Step 3: Cross multiply
    543.18x = 749.68 × 403.46
  4. Step 4: Simplify right side
    543.18x = 302,465.89
  5. Step 5: Solve for x
    x = 302,465.89/543.18
  6. Step 6: Final answer
    x = 556.84

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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.