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Finding the Fourth Proportional to 398,645.40, 550,133.25 and 217,360.32

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Solution

The fourth proportional to 398,645.40, 550,133.25 and 217,360.32 is: 299,958.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,645.40 : 550,133.25 = 217,360.32 : x
  2. Step 2: Convert to fraction form
    398,645.40/550,133.25 = 217,360.32/x
  3. Step 3: Cross multiply
    398,645.40x = 550,133.25 × 217,360.32
  4. Step 4: Simplify right side
    398,645.40x = 119,577,139,262.64
  5. Step 5: Solve for x
    x = 119,577,139,262.64/398,645.40
  6. Step 6: Final answer
    x = 299,958.66

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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.