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Finding the Third Proportional to 288,639 and 429,880.50

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Solution

The third proportional to 288,639 and 429,880.50 is: 640,236.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,639 : 429,880.50 = 429,880.50 : x
  2. Step 2: Convert to fraction form
    288,639/429,880.50 = 429,880.50/x
  3. Step 3: Cross multiply
    288,639x = 429,880.50 × 429,880.50
  4. Step 4: Simplify right side
    288,639x = 184,797,244,280.25
  5. Step 5: Solve for x
    x = 184,797,244,280.25/288,639
  6. Step 6: Final answer
    x = 640,236.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.