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Finding the Fourth Proportional to 377,422.40, 521,035.79 and 291,187.77

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Solution

The fourth proportional to 377,422.40, 521,035.79 and 291,187.77 is: 401,987.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    377,422.40 : 521,035.79 = 291,187.77 : x
  2. Step 2: Convert to fraction form
    377,422.40/521,035.79 = 291,187.77/x
  3. Step 3: Cross multiply
    377,422.40x = 521,035.79 × 291,187.77
  4. Step 4: Simplify right side
    377,422.40x = 151,719,248,324.35
  5. Step 5: Solve for x
    x = 151,719,248,324.35/377,422.40
  6. Step 6: Final answer
    x = 401,987.93

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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.