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Finding the Fourth Proportional to 384,005.40, 576,008.10 and 215,352.60

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Solution

The fourth proportional to 384,005.40, 576,008.10 and 215,352.60 is: 323,028.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,005.40 : 576,008.10 = 215,352.60 : x
  2. Step 2: Convert to fraction form
    384,005.40/576,008.10 = 215,352.60/x
  3. Step 3: Cross multiply
    384,005.40x = 576,008.10 × 215,352.60
  4. Step 4: Simplify right side
    384,005.40x = 124,044,841,956.06
  5. Step 5: Solve for x
    x = 124,044,841,956.06/384,005.40
  6. Step 6: Final answer
    x = 323,028.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.