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Finding the Fourth Proportional to 425.93, 639 and 152.06

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Solution

The fourth proportional to 425.93, 639 and 152.06 is: 228.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.93 : 639 = 152.06 : x
  2. Step 2: Convert to fraction form
    425.93/639 = 152.06/x
  3. Step 3: Cross multiply
    425.93x = 639 × 152.06
  4. Step 4: Simplify right side
    425.93x = 97,163.15
  5. Step 5: Solve for x
    x = 97,163.15/425.93
  6. Step 6: Final answer
    x = 228.12

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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.