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Finding the Fourth Proportional to 399,246.80, 598,870.20 and 189,294.80

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Solution

The fourth proportional to 399,246.80, 598,870.20 and 189,294.80 is: 283,942.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,246.80 : 598,870.20 = 189,294.80 : x
  2. Step 2: Convert to fraction form
    399,246.80/598,870.20 = 189,294.80/x
  3. Step 3: Cross multiply
    399,246.80x = 598,870.20 × 189,294.80
  4. Step 4: Simplify right side
    399,246.80x = 113,363,014,734.96
  5. Step 5: Solve for x
    x = 113,363,014,734.96/399,246.80
  6. Step 6: Final answer
    x = 283,942.20

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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.