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Finding the Third Proportional to 287,216.50 and 402,480.50

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Solution

The third proportional to 287,216.50 and 402,480.50 is: 564,001.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,216.50 : 402,480.50 = 402,480.50 : x
  2. Step 2: Convert to fraction form
    287,216.50/402,480.50 = 402,480.50/x
  3. Step 3: Cross multiply
    287,216.50x = 402,480.50 × 402,480.50
  4. Step 4: Simplify right side
    287,216.50x = 161,990,552,880.25
  5. Step 5: Solve for x
    x = 161,990,552,880.25/287,216.50
  6. Step 6: Final answer
    x = 564,001.56

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.