Home / 719,021.80-992,255.40-396,743.80

Finding the Fourth Proportional to 719,021.80, 992,255.40 and 396,743.80

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Solution

The fourth proportional to 719,021.80, 992,255.40 and 396,743.80 is: 547,509.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,021.80 : 992,255.40 = 396,743.80 : x
  2. Step 2: Convert to fraction form
    719,021.80/992,255.40 = 396,743.80/x
  3. Step 3: Cross multiply
    719,021.80x = 992,255.40 × 396,743.80
  4. Step 4: Simplify right side
    719,021.80x = 393,671,177,966.52
  5. Step 5: Solve for x
    x = 393,671,177,966.52/719,021.80
  6. Step 6: Final answer
    x = 547,509.38

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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.