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Finding the Fourth Proportional to 398,950.57, 550,549.91 and 217,661.93

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Solution

The fourth proportional to 398,950.57, 550,549.91 and 217,661.93 is: 300,372.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,950.57 : 550,549.91 = 217,661.93 : x
  2. Step 2: Convert to fraction form
    398,950.57/550,549.91 = 217,661.93/x
  3. Step 3: Cross multiply
    398,950.57x = 550,549.91 × 217,661.93
  4. Step 4: Simplify right side
    398,950.57x = 119,833,758,924.74
  5. Step 5: Solve for x
    x = 119,833,758,924.74/398,950.57
  6. Step 6: Final answer
    x = 300,372.45

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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.