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Finding the Fourth Proportional to 536.40, 805.40 and 374.80

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Solution

The fourth proportional to 536.40, 805.40 and 374.80 is: 562.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    536.40 : 805.40 = 374.80 : x
  2. Step 2: Convert to fraction form
    536.40/805.40 = 374.80/x
  3. Step 3: Cross multiply
    536.40x = 805.40 × 374.80
  4. Step 4: Simplify right side
    536.40x = 301,863.92
  5. Step 5: Solve for x
    x = 301,863.92/536.40
  6. Step 6: Final answer
    x = 562.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.