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Finding the Fourth Proportional to 385.29, 577.80 and 168.75

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Solution

The fourth proportional to 385.29, 577.80 and 168.75 is: 253.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.29 : 577.80 = 168.75 : x
  2. Step 2: Convert to fraction form
    385.29/577.80 = 168.75/x
  3. Step 3: Cross multiply
    385.29x = 577.80 × 168.75
  4. Step 4: Simplify right side
    385.29x = 97,503.75
  5. Step 5: Solve for x
    x = 97,503.75/385.29
  6. Step 6: Final answer
    x = 253.07

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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.