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Finding the Fourth Proportional to 357.68, 536.40 and 126.53

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Solution

The fourth proportional to 357.68, 536.40 and 126.53 is: 189.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.68 : 536.40 = 126.53 : x
  2. Step 2: Convert to fraction form
    357.68/536.40 = 126.53/x
  3. Step 3: Cross multiply
    357.68x = 536.40 × 126.53
  4. Step 4: Simplify right side
    357.68x = 67,870.69
  5. Step 5: Solve for x
    x = 67,870.69/357.68
  6. Step 6: Final answer
    x = 189.75

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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.