Home / 728,701.20-1,091,739.60-447,890.40

Finding the Fourth Proportional to 728,701.20, 1,091,739.60 and 447,890.40

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Solution

The fourth proportional to 728,701.20, 1,091,739.60 and 447,890.40 is: 671,029.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,701.20 : 1,091,739.60 = 447,890.40 : x
  2. Step 2: Convert to fraction form
    728,701.20/1,091,739.60 = 447,890.40/x
  3. Step 3: Cross multiply
    728,701.20x = 1,091,739.60 × 447,890.40
  4. Step 4: Simplify right side
    728,701.20x = 488,979,686,139.84
  5. Step 5: Solve for x
    x = 488,979,686,139.84/728,701.20
  6. Step 6: Final answer
    x = 671,029.07

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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.