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Finding the Fourth Proportional to 520,679.27, 718,603.95 and 291,249.30

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Solution

The fourth proportional to 520,679.27, 718,603.95 and 291,249.30 is: 401,961.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,679.27 : 718,603.95 = 291,249.30 : x
  2. Step 2: Convert to fraction form
    520,679.27/718,603.95 = 291,249.30/x
  3. Step 3: Cross multiply
    520,679.27x = 718,603.95 × 291,249.30
  4. Step 4: Simplify right side
    520,679.27x = 209,292,897,414.74
  5. Step 5: Solve for x
    x = 209,292,897,414.74/520,679.27
  6. Step 6: Final answer
    x = 401,961.27

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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.