Home / 728,103.12-1,091,296.89-328,275.78

Finding the Fourth Proportional to 728,103.12, 1,091,296.89 and 328,275.78

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Solution

The fourth proportional to 728,103.12, 1,091,296.89 and 328,275.78 is: 492,026.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,103.12 : 1,091,296.89 = 328,275.78 : x
  2. Step 2: Convert to fraction form
    728,103.12/1,091,296.89 = 328,275.78/x
  3. Step 3: Cross multiply
    728,103.12x = 1,091,296.89 × 328,275.78
  4. Step 4: Simplify right side
    728,103.12x = 358,246,337,776.32
  5. Step 5: Solve for x
    x = 358,246,337,776.32/728,103.12
  6. Step 6: Final answer
    x = 492,026.92

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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.