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Finding the Fourth Proportional to 386,474.60, 579,711.90 and 106,020.20

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Solution

The fourth proportional to 386,474.60, 579,711.90 and 106,020.20 is: 159,030.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,474.60 : 579,711.90 = 106,020.20 : x
  2. Step 2: Convert to fraction form
    386,474.60/579,711.90 = 106,020.20/x
  3. Step 3: Cross multiply
    386,474.60x = 579,711.90 × 106,020.20
  4. Step 4: Simplify right side
    386,474.60x = 61,461,171,580.38
  5. Step 5: Solve for x
    x = 61,461,171,580.38/386,474.60
  6. Step 6: Final answer
    x = 159,030.30

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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.