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Finding the Fourth Proportional to 384,771.48, 530,983.80 and 215,005.61

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Solution

The fourth proportional to 384,771.48, 530,983.80 and 215,005.61 is: 296,707.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,771.48 : 530,983.80 = 215,005.61 : x
  2. Step 2: Convert to fraction form
    384,771.48/530,983.80 = 215,005.61/x
  3. Step 3: Cross multiply
    384,771.48x = 530,983.80 × 215,005.61
  4. Step 4: Simplify right side
    384,771.48x = 114,164,493,164.20
  5. Step 5: Solve for x
    x = 114,164,493,164.20/384,771.48
  6. Step 6: Final answer
    x = 296,707.26

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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.