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Finding the Third Proportional to 420.88 and 577.50

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Solution

The third proportional to 420.88 and 577.50 is: 792.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    420.88 : 577.50 = 577.50 : x
  2. Step 2: Convert to fraction form
    420.88/577.50 = 577.50/x
  3. Step 3: Cross multiply
    420.88x = 577.50 × 577.50
  4. Step 4: Simplify right side
    420.88x = 333,506.25
  5. Step 5: Solve for x
    x = 333,506.25/420.88
  6. Step 6: Final answer
    x = 792.41

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.