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Finding the Fourth Proportional to 520,076.20, 717,706.13 and 290,633.49

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Solution

The fourth proportional to 520,076.20, 717,706.13 and 290,633.49 is: 401,074.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,076.20 : 717,706.13 = 290,633.49 : x
  2. Step 2: Convert to fraction form
    520,076.20/717,706.13 = 290,633.49/x
  3. Step 3: Cross multiply
    520,076.20x = 717,706.13 × 290,633.49
  4. Step 4: Simplify right side
    520,076.20x = 208,589,433,767.76
  5. Step 5: Solve for x
    x = 208,589,433,767.76/520,076.20
  6. Step 6: Final answer
    x = 401,074.75

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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.