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Finding the Fourth Proportional to 536.78, 740.86 and 315.85

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Solution

The fourth proportional to 536.78, 740.86 and 315.85 is: 435.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    536.78 : 740.86 = 315.85 : x
  2. Step 2: Convert to fraction form
    536.78/740.86 = 315.85/x
  3. Step 3: Cross multiply
    536.78x = 740.86 × 315.85
  4. Step 4: Simplify right side
    536.78x = 234,000.63
  5. Step 5: Solve for x
    x = 234,000.63/536.78
  6. Step 6: Final answer
    x = 435.93

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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.