Home / 728,800.72-1,005,746.76-406,531.60

Finding the Fourth Proportional to 728,800.72, 1,005,746.76 and 406,531.60

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Solution

The fourth proportional to 728,800.72, 1,005,746.76 and 406,531.60 is: 561,014.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,800.72 : 1,005,746.76 = 406,531.60 : x
  2. Step 2: Convert to fraction form
    728,800.72/1,005,746.76 = 406,531.60/x
  3. Step 3: Cross multiply
    728,800.72x = 1,005,746.76 × 406,531.60
  4. Step 4: Simplify right side
    728,800.72x = 408,867,839,537.62
  5. Step 5: Solve for x
    x = 408,867,839,537.62/728,800.72
  6. Step 6: Final answer
    x = 561,014.59

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Double scale
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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.