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Finding the Fourth Proportional to 298,900.80, 448,471.35 and 121,421.70

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Solution

The fourth proportional to 298,900.80, 448,471.35 and 121,421.70 is: 182,181.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,900.80 : 448,471.35 = 121,421.70 : x
  2. Step 2: Convert to fraction form
    298,900.80/448,471.35 = 121,421.70/x
  3. Step 3: Cross multiply
    298,900.80x = 448,471.35 × 121,421.70
  4. Step 4: Simplify right side
    298,900.80x = 54,454,153,718.30
  5. Step 5: Solve for x
    x = 54,454,153,718.30/298,900.80
  6. Step 6: Final answer
    x = 182,181.36

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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.