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Finding the Third Proportional to 288,780 and 430,776

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Solution

The third proportional to 288,780 and 430,776 is: 642,592.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,780 : 430,776 = 430,776 : x
  2. Step 2: Convert to fraction form
    288,780/430,776 = 430,776/x
  3. Step 3: Cross multiply
    288,780x = 430,776 × 430,776
  4. Step 4: Simplify right side
    288,780x = 185,567,962,176
  5. Step 5: Solve for x
    x = 185,567,962,176/288,780
  6. Step 6: Final answer
    x = 642,592.85

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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.