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Finding the Third Proportional to 279,359 and 432,476

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Solution

The third proportional to 279,359 and 432,476 is: 669,516.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,359 : 432,476 = 432,476 : x
  2. Step 2: Convert to fraction form
    279,359/432,476 = 432,476/x
  3. Step 3: Cross multiply
    279,359x = 432,476 × 432,476
  4. Step 4: Simplify right side
    279,359x = 187,035,490,576
  5. Step 5: Solve for x
    x = 187,035,490,576/279,359
  6. Step 6: Final answer
    x = 669,516.61

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.