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Finding the Fourth Proportional to 384,725.61, 530,904.87 and 212,634.72

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Solution

The fourth proportional to 384,725.61, 530,904.87 and 212,634.72 is: 293,426.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,725.61 : 530,904.87 = 212,634.72 : x
  2. Step 2: Convert to fraction form
    384,725.61/530,904.87 = 212,634.72/x
  3. Step 3: Cross multiply
    384,725.61x = 530,904.87 × 212,634.72
  4. Step 4: Simplify right side
    384,725.61x = 112,888,808,379.09
  5. Step 5: Solve for x
    x = 112,888,808,379.09/384,725.61
  6. Step 6: Final answer
    x = 293,426.81

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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.