Home / 728,698.38-1,005,605.54-406,429.35

Finding the Fourth Proportional to 728,698.38, 1,005,605.54 and 406,429.35

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Solution

The fourth proportional to 728,698.38, 1,005,605.54 and 406,429.35 is: 560,873.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,698.38 : 1,005,605.54 = 406,429.35 : x
  2. Step 2: Convert to fraction form
    728,698.38/1,005,605.54 = 406,429.35/x
  3. Step 3: Cross multiply
    728,698.38x = 1,005,605.54 × 406,429.35
  4. Step 4: Simplify right side
    728,698.38x = 408,707,603,946.45
  5. Step 5: Solve for x
    x = 408,707,603,946.45/728,698.38
  6. Step 6: Final answer
    x = 560,873.49

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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.