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Finding the Fourth Proportional to 400,667.81, 552,921.71 and 219,391.20

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Solution

The fourth proportional to 400,667.81, 552,921.71 and 219,391.20 is: 302,759.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,667.81 : 552,921.71 = 219,391.20 : x
  2. Step 2: Convert to fraction form
    400,667.81/552,921.71 = 219,391.20/x
  3. Step 3: Cross multiply
    400,667.81x = 552,921.71 × 219,391.20
  4. Step 4: Simplify right side
    400,667.81x = 121,306,156,366.00
  5. Step 5: Solve for x
    x = 121,306,156,366.00/400,667.81
  6. Step 6: Final answer
    x = 302,759.93

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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.