Home / 812,961.10-1,218,129.45-512,904.70

Finding the Fourth Proportional to 812,961.10, 1,218,129.45 and 512,904.70

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Solution

The fourth proportional to 812,961.10, 1,218,129.45 and 512,904.70 is: 768,529.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,961.10 : 1,218,129.45 = 512,904.70 : x
  2. Step 2: Convert to fraction form
    812,961.10/1,218,129.45 = 512,904.70/x
  3. Step 3: Cross multiply
    812,961.10x = 1,218,129.45 × 512,904.70
  4. Step 4: Simplify right side
    812,961.10x = 624,784,320,113.42
  5. Step 5: Solve for x
    x = 624,784,320,113.42/812,961.10
  6. Step 6: Final answer
    x = 768,529.17

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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.