Home / 728,689.20-1,091,721.60-447,878.40

Finding the Fourth Proportional to 728,689.20, 1,091,721.60 and 447,878.40

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Solution

The fourth proportional to 728,689.20, 1,091,721.60 and 447,878.40 is: 671,011.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,689.20 : 1,091,721.60 = 447,878.40 : x
  2. Step 2: Convert to fraction form
    728,689.20/1,091,721.60 = 447,878.40/x
  3. Step 3: Cross multiply
    728,689.20x = 1,091,721.60 × 447,878.40
  4. Step 4: Simplify right side
    728,689.20x = 488,958,523,453.44
  5. Step 5: Solve for x
    x = 488,958,523,453.44/728,689.20
  6. Step 6: Final answer
    x = 671,011.08

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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.