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Finding the Fourth Proportional to 297,987.40, 447,060.30 and 129,435.40

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Solution

The fourth proportional to 297,987.40, 447,060.30 and 129,435.40 is: 194,187.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,987.40 : 447,060.30 = 129,435.40 : x
  2. Step 2: Convert to fraction form
    297,987.40/447,060.30 = 129,435.40/x
  3. Step 3: Cross multiply
    297,987.40x = 447,060.30 × 129,435.40
  4. Step 4: Simplify right side
    297,987.40x = 57,865,428,754.62
  5. Step 5: Solve for x
    x = 57,865,428,754.62/297,987.40
  6. Step 6: Final answer
    x = 194,187.50

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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.