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Finding the Fourth Proportional to 384,574.72, 530,711.09 and 212,504.55

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Solution

The fourth proportional to 384,574.72, 530,711.09 and 212,504.55 is: 293,255.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,574.72 : 530,711.09 = 212,504.55 : x
  2. Step 2: Convert to fraction form
    384,574.72/530,711.09 = 212,504.55/x
  3. Step 3: Cross multiply
    384,574.72x = 530,711.09 × 212,504.55
  4. Step 4: Simplify right side
    384,574.72x = 112,778,523,022.80
  5. Step 5: Solve for x
    x = 112,778,523,022.80/384,574.72
  6. Step 6: Final answer
    x = 293,255.16

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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.