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Finding the Fourth Proportional to 394,931.34, 545,005.41 and 213,643.23

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Solution

The fourth proportional to 394,931.34, 545,005.41 and 213,643.23 is: 294,827.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,931.34 : 545,005.41 = 213,643.23 : x
  2. Step 2: Convert to fraction form
    394,931.34/545,005.41 = 213,643.23/x
  3. Step 3: Cross multiply
    394,931.34x = 545,005.41 × 213,643.23
  4. Step 4: Simplify right side
    394,931.34x = 116,436,716,159.87
  5. Step 5: Solve for x
    x = 116,436,716,159.87/394,931.34
  6. Step 6: Final answer
    x = 294,827.74

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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.