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Finding the Fourth Proportional to 386,475.60, 579,713.40 and 106,021.20

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Solution

The fourth proportional to 386,475.60, 579,713.40 and 106,021.20 is: 159,031.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,475.60 : 579,713.40 = 106,021.20 : x
  2. Step 2: Convert to fraction form
    386,475.60/579,713.40 = 106,021.20/x
  3. Step 3: Cross multiply
    386,475.60x = 579,713.40 × 106,021.20
  4. Step 4: Simplify right side
    386,475.60x = 61,461,910,324.08
  5. Step 5: Solve for x
    x = 61,461,910,324.08/386,475.60
  6. Step 6: Final answer
    x = 159,031.80

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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.