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Finding the Fourth Proportional to 669,410.78, 923,555.94 and 427,834.76

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Solution

The fourth proportional to 669,410.78, 923,555.94 and 427,834.76 is: 590,264.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,410.78 : 923,555.94 = 427,834.76 : x
  2. Step 2: Convert to fraction form
    669,410.78/923,555.94 = 427,834.76/x
  3. Step 3: Cross multiply
    669,410.78x = 923,555.94 × 427,834.76
  4. Step 4: Simplify right side
    669,410.78x = 395,129,329,318.70
  5. Step 5: Solve for x
    x = 395,129,329,318.70/669,410.78
  6. Step 6: Final answer
    x = 590,264.37

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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.