Home / 812,864.60-1,217,984.70-512,808.20

Finding the Fourth Proportional to 812,864.60, 1,217,984.70 and 512,808.20

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Solution

The fourth proportional to 812,864.60, 1,217,984.70 and 512,808.20 is: 768,384.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,864.60 : 1,217,984.70 = 512,808.20 : x
  2. Step 2: Convert to fraction form
    812,864.60/1,217,984.70 = 512,808.20/x
  3. Step 3: Cross multiply
    812,864.60x = 1,217,984.70 × 512,808.20
  4. Step 4: Simplify right side
    812,864.60x = 624,592,541,634.54
  5. Step 5: Solve for x
    x = 624,592,541,634.54/812,864.60
  6. Step 6: Final answer
    x = 768,384.48

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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.