Home / 728,809.72-1,005,758.94-406,511.52

Finding the Fourth Proportional to 728,809.72, 1,005,758.94 and 406,511.52

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Solution

The fourth proportional to 728,809.72, 1,005,758.94 and 406,511.52 is: 560,986.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,809.72 : 1,005,758.94 = 406,511.52 : x
  2. Step 2: Convert to fraction form
    728,809.72/1,005,758.94 = 406,511.52/x
  3. Step 3: Cross multiply
    728,809.72x = 1,005,758.94 × 406,511.52
  4. Step 4: Simplify right side
    728,809.72x = 408,852,595,452.99
  5. Step 5: Solve for x
    x = 408,852,595,452.99/728,809.72
  6. Step 6: Final answer
    x = 560,986.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.