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Finding the Fourth Proportional to 609,392.85, 913,529.42 and 209,938.65

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Solution

The fourth proportional to 609,392.85, 913,529.42 and 209,938.65 is: 314,715.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,392.85 : 913,529.42 = 209,938.65 : x
  2. Step 2: Convert to fraction form
    609,392.85/913,529.42 = 209,938.65/x
  3. Step 3: Cross multiply
    609,392.85x = 913,529.42 × 209,938.65
  4. Step 4: Simplify right side
    609,392.85x = 191,785,133,170.08
  5. Step 5: Solve for x
    x = 191,785,133,170.08/609,392.85
  6. Step 6: Final answer
    x = 314,715.10

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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.