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Finding the Fourth Proportional to 447,064.40, 670,531.80 and 131,488.40

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Solution

The fourth proportional to 447,064.40, 670,531.80 and 131,488.40 is: 197,213.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,064.40 : 670,531.80 = 131,488.40 : x
  2. Step 2: Convert to fraction form
    447,064.40/670,531.80 = 131,488.40/x
  3. Step 3: Cross multiply
    447,064.40x = 670,531.80 × 131,488.40
  4. Step 4: Simplify right side
    447,064.40x = 88,167,153,531.12
  5. Step 5: Solve for x
    x = 88,167,153,531.12/447,064.40
  6. Step 6: Final answer
    x = 197,213.54

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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.