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Finding the Fourth Proportional to 418,651, 577,790.70 and 239,803

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Solution

The fourth proportional to 418,651, 577,790.70 and 239,803 is: 330,958.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,651 : 577,790.70 = 239,803 : x
  2. Step 2: Convert to fraction form
    418,651/577,790.70 = 239,803/x
  3. Step 3: Cross multiply
    418,651x = 577,790.70 × 239,803
  4. Step 4: Simplify right side
    418,651x = 138,555,943,232.10
  5. Step 5: Solve for x
    x = 138,555,943,232.10/418,651
  6. Step 6: Final answer
    x = 330,958.11

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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.