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Finding the Fourth Proportional to 298,051.40, 447,156.30 and 129,499.40

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Solution

The fourth proportional to 298,051.40, 447,156.30 and 129,499.40 is: 194,283.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,051.40 : 447,156.30 = 129,499.40 : x
  2. Step 2: Convert to fraction form
    298,051.40/447,156.30 = 129,499.40/x
  3. Step 3: Cross multiply
    298,051.40x = 447,156.30 × 129,499.40
  4. Step 4: Simplify right side
    298,051.40x = 57,906,472,556.22
  5. Step 5: Solve for x
    x = 57,906,472,556.22/298,051.40
  6. Step 6: Final answer
    x = 194,283.51

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1.5x scale

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.