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Finding the Third Proportional to 385,720.50 and 578,200.50

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Solution

The third proportional to 385,720.50 and 578,200.50 is: 866,730.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,720.50 : 578,200.50 = 578,200.50 : x
  2. Step 2: Convert to fraction form
    385,720.50/578,200.50 = 578,200.50/x
  3. Step 3: Cross multiply
    385,720.50x = 578,200.50 × 578,200.50
  4. Step 4: Simplify right side
    385,720.50x = 334,315,818,200.25
  5. Step 5: Solve for x
    x = 334,315,818,200.25/385,720.50
  6. Step 6: Final answer
    x = 866,730.75

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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.