Home / 815,859.47-1,223,789.19-310,303.65

Finding the Fourth Proportional to 815,859.47, 1,223,789.19 and 310,303.65

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Solution

The fourth proportional to 815,859.47, 1,223,789.19 and 310,303.65 is: 465,455.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,859.47 : 1,223,789.19 = 310,303.65 : x
  2. Step 2: Convert to fraction form
    815,859.47/1,223,789.19 = 310,303.65/x
  3. Step 3: Cross multiply
    815,859.47x = 1,223,789.19 × 310,303.65
  4. Step 4: Simplify right side
    815,859.47x = 379,746,252,487.54
  5. Step 5: Solve for x
    x = 379,746,252,487.54/815,859.47
  6. Step 6: Final answer
    x = 465,455.47

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.