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Finding the Fourth Proportional to 405.03, 607.52 and 243.75

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Solution

The fourth proportional to 405.03, 607.52 and 243.75 is: 365.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.03 : 607.52 = 243.75 : x
  2. Step 2: Convert to fraction form
    405.03/607.52 = 243.75/x
  3. Step 3: Cross multiply
    405.03x = 607.52 × 243.75
  4. Step 4: Simplify right side
    405.03x = 148,081.78
  5. Step 5: Solve for x
    x = 148,081.78/405.03
  6. Step 6: Final answer
    x = 365.61

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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.