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Finding the Fourth Proportional to 768,123.70, 1,059,715.05 and 481,144.18

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Solution

The fourth proportional to 768,123.70, 1,059,715.05 and 481,144.18 is: 663,793.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,123.70 : 1,059,715.05 = 481,144.18 : x
  2. Step 2: Convert to fraction form
    768,123.70/1,059,715.05 = 481,144.18/x
  3. Step 3: Cross multiply
    768,123.70x = 1,059,715.05 × 481,144.18
  4. Step 4: Simplify right side
    768,123.70x = 509,875,728,765.91
  5. Step 5: Solve for x
    x = 509,875,728,765.91/768,123.70
  6. Step 6: Final answer
    x = 663,793.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.