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Finding the Third Proportional to 402 and 560

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Solution

The third proportional to 402 and 560 is: 780.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    402 : 560 = 560 : x
  2. Step 2: Convert to fraction form
    402/560 = 560/x
  3. Step 3: Cross multiply
    402x = 560 × 560
  4. Step 4: Simplify right side
    402x = 313,600
  5. Step 5: Solve for x
    x = 313,600/402
  6. Step 6: Final answer
    x = 780.10

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These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.