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Finding the Fourth Proportional to 691,469.76, 954,464.40 and 405,081.12

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Solution

The fourth proportional to 691,469.76, 954,464.40 and 405,081.12 is: 559,150.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,469.76 : 954,464.40 = 405,081.12 : x
  2. Step 2: Convert to fraction form
    691,469.76/954,464.40 = 405,081.12/x
  3. Step 3: Cross multiply
    691,469.76x = 954,464.40 × 405,081.12
  4. Step 4: Simplify right side
    691,469.76x = 386,635,508,152.13
  5. Step 5: Solve for x
    x = 386,635,508,152.13/691,469.76
  6. Step 6: Final answer
    x = 559,150.28

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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.