Home / 719,102.66-992,317.05-396,815.30

Finding the Fourth Proportional to 719,102.66, 992,317.05 and 396,815.30

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Solution

The fourth proportional to 719,102.66, 992,317.05 and 396,815.30 is: 547,580.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,102.66 : 992,317.05 = 396,815.30 : x
  2. Step 2: Convert to fraction form
    719,102.66/992,317.05 = 396,815.30/x
  3. Step 3: Cross multiply
    719,102.66x = 992,317.05 × 396,815.30
  4. Step 4: Simplify right side
    719,102.66x = 393,766,587,890.87
  5. Step 5: Solve for x
    x = 393,766,587,890.87/719,102.66
  6. Step 6: Final answer
    x = 547,580.49

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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.