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Finding the Fourth Proportional to 674,470.08, 930,956.40 and 388,082.43

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Solution

The fourth proportional to 674,470.08, 930,956.40 and 388,082.43 is: 535,661.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,470.08 : 930,956.40 = 388,082.43 : x
  2. Step 2: Convert to fraction form
    674,470.08/930,956.40 = 388,082.43/x
  3. Step 3: Cross multiply
    674,470.08x = 930,956.40 × 388,082.43
  4. Step 4: Simplify right side
    674,470.08x = 361,287,821,936.05
  5. Step 5: Solve for x
    x = 361,287,821,936.05/674,470.08
  6. Step 6: Final answer
    x = 535,661.75

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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.