Home / 719,136.72-992,390.38-396,842.60

Finding the Fourth Proportional to 719,136.72, 992,390.38 and 396,842.60

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Solution

The fourth proportional to 719,136.72, 992,390.38 and 396,842.60 is: 547,632.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,136.72 : 992,390.38 = 396,842.60 : x
  2. Step 2: Convert to fraction form
    719,136.72/992,390.38 = 396,842.60/x
  3. Step 3: Cross multiply
    719,136.72x = 992,390.38 × 396,842.60
  4. Step 4: Simplify right side
    719,136.72x = 393,822,778,614.19
  5. Step 5: Solve for x
    x = 393,822,778,614.19/719,136.72
  6. Step 6: Final answer
    x = 547,632.69

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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.