Home / 728,769.54-1,005,656.36-402,086.42

Finding the Fourth Proportional to 728,769.54, 1,005,656.36 and 402,086.42

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Solution

The fourth proportional to 728,769.54, 1,005,656.36 and 402,086.42 is: 554,854.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,769.54 : 1,005,656.36 = 402,086.42 : x
  2. Step 2: Convert to fraction form
    728,769.54/1,005,656.36 = 402,086.42/x
  3. Step 3: Cross multiply
    728,769.54x = 1,005,656.36 × 402,086.42
  4. Step 4: Simplify right side
    728,769.54x = 404,360,758,503.92
  5. Step 5: Solve for x
    x = 404,360,758,503.92/728,769.54
  6. Step 6: Final answer
    x = 554,854.09

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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.