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Finding the Fourth Proportional to 520,636.30, 718,476.01 and 291,192.66

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Solution

The fourth proportional to 520,636.30, 718,476.01 and 291,192.66 is: 401,844.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,636.30 : 718,476.01 = 291,192.66 : x
  2. Step 2: Convert to fraction form
    520,636.30/718,476.01 = 291,192.66/x
  3. Step 3: Cross multiply
    520,636.30x = 718,476.01 × 291,192.66
  4. Step 4: Simplify right side
    520,636.30x = 209,214,939,770.11
  5. Step 5: Solve for x
    x = 209,214,939,770.11/520,636.30
  6. Step 6: Final answer
    x = 401,844.71

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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.