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Finding the Fourth Proportional to 517.40, 776.21 and 152.21

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Solution

The fourth proportional to 517.40, 776.21 and 152.21 is: 228.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.40 : 776.21 = 152.21 : x
  2. Step 2: Convert to fraction form
    517.40/776.21 = 152.21/x
  3. Step 3: Cross multiply
    517.40x = 776.21 × 152.21
  4. Step 4: Simplify right side
    517.40x = 118,146.92
  5. Step 5: Solve for x
    x = 118,146.92/517.40
  6. Step 6: Final answer
    x = 228.35

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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.