Home / 728,801.45-1,005,747.53-406,503.26

Finding the Fourth Proportional to 728,801.45, 1,005,747.53 and 406,503.26

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Solution

The fourth proportional to 728,801.45, 1,005,747.53 and 406,503.26 is: 560,975.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,801.45 : 1,005,747.53 = 406,503.26 : x
  2. Step 2: Convert to fraction form
    728,801.45/1,005,747.53 = 406,503.26/x
  3. Step 3: Cross multiply
    728,801.45x = 1,005,747.53 × 406,503.26
  4. Step 4: Simplify right side
    728,801.45x = 408,839,642,620.69
  5. Step 5: Solve for x
    x = 408,839,642,620.69/728,801.45
  6. Step 6: Final answer
    x = 560,975.35

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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.