Home / 728,353.28-1,005,116.54-406,055.09

Finding the Fourth Proportional to 728,353.28, 1,005,116.54 and 406,055.09

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Solution

The fourth proportional to 728,353.28, 1,005,116.54 and 406,055.09 is: 560,349.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,353.28 : 1,005,116.54 = 406,055.09 : x
  2. Step 2: Convert to fraction form
    728,353.28/1,005,116.54 = 406,055.09/x
  3. Step 3: Cross multiply
    728,353.28x = 1,005,116.54 × 406,055.09
  4. Step 4: Simplify right side
    728,353.28x = 408,132,680,054.33
  5. Step 5: Solve for x
    x = 408,132,680,054.33/728,353.28
  6. Step 6: Final answer
    x = 560,349.89

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Double scale
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Similar ratio
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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.