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Finding the Fourth Proportional to 520,396.50, 718,148.37 and 290,961.96

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Solution

The fourth proportional to 520,396.50, 718,148.37 and 290,961.96 is: 401,528.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,396.50 : 718,148.37 = 290,961.96 : x
  2. Step 2: Convert to fraction form
    520,396.50/718,148.37 = 290,961.96/x
  3. Step 3: Cross multiply
    520,396.50x = 718,148.37 × 290,961.96
  4. Step 4: Simplify right side
    520,396.50x = 208,953,857,306.01
  5. Step 5: Solve for x
    x = 208,953,857,306.01/520,396.50
  6. Step 6: Final answer
    x = 401,528.18

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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.