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Finding the Fourth Proportional to 536.83, 740.68 and 312.69

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Solution

The fourth proportional to 536.83, 740.68 and 312.69 is: 431.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    536.83 : 740.68 = 312.69 : x
  2. Step 2: Convert to fraction form
    536.83/740.68 = 312.69/x
  3. Step 3: Cross multiply
    536.83x = 740.68 × 312.69
  4. Step 4: Simplify right side
    536.83x = 231,603.23
  5. Step 5: Solve for x
    x = 231,603.23/536.83
  6. Step 6: Final answer
    x = 431.43

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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.