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Finding the Fourth Proportional to 386,952.40, 580,428.60 and 106,469.20

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Solution

The fourth proportional to 386,952.40, 580,428.60 and 106,469.20 is: 159,703.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,952.40 : 580,428.60 = 106,469.20 : x
  2. Step 2: Convert to fraction form
    386,952.40/580,428.60 = 106,469.20/x
  3. Step 3: Cross multiply
    386,952.40x = 580,428.60 × 106,469.20
  4. Step 4: Simplify right side
    386,952.40x = 61,797,768,699.12
  5. Step 5: Solve for x
    x = 61,797,768,699.12/386,952.40
  6. Step 6: Final answer
    x = 159,703.80

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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.