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Finding the Fourth Proportional to 520,081.56, 717,698.68 and 290,640.64

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Solution

The fourth proportional to 520,081.56, 717,698.68 and 290,640.64 is: 401,076.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,081.56 : 717,698.68 = 290,640.64 : x
  2. Step 2: Convert to fraction form
    520,081.56/717,698.68 = 290,640.64/x
  3. Step 3: Cross multiply
    520,081.56x = 717,698.68 × 290,640.64
  4. Step 4: Simplify right side
    520,081.56x = 208,592,403,682.36
  5. Step 5: Solve for x
    x = 208,592,403,682.36/520,081.56
  6. Step 6: Final answer
    x = 401,076.33

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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.