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Finding the Fourth Proportional to 669,409.68, 923,004.90 and 499,348.56

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Solution

The fourth proportional to 669,409.68, 923,004.90 and 499,348.56 is: 688,518.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,409.68 : 923,004.90 = 499,348.56 : x
  2. Step 2: Convert to fraction form
    669,409.68/923,004.90 = 499,348.56/x
  3. Step 3: Cross multiply
    669,409.68x = 923,004.90 × 499,348.56
  4. Step 4: Simplify right side
    669,409.68x = 460,901,167,687.94
  5. Step 5: Solve for x
    x = 460,901,167,687.94/669,409.68
  6. Step 6: Final answer
    x = 688,518.83

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Double scale
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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.