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Finding the Fourth Proportional to 919,609.70, 1,379,398.44 and 413,812.69

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Solution

The fourth proportional to 919,609.70, 1,379,398.44 and 413,812.69 is: 620,711.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,609.70 : 1,379,398.44 = 413,812.69 : x
  2. Step 2: Convert to fraction form
    919,609.70/1,379,398.44 = 413,812.69/x
  3. Step 3: Cross multiply
    919,609.70x = 1,379,398.44 × 413,812.69
  4. Step 4: Simplify right side
    919,609.70x = 570,812,579,038.20
  5. Step 5: Solve for x
    x = 570,812,579,038.20/919,609.70
  6. Step 6: Final answer
    x = 620,711.79

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1.5x scale

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.