Home / 519,944.80-779,917.20-319,615.60

Finding the Fourth Proportional to 519,944.80, 779,917.20 and 319,615.60

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Solution

The fourth proportional to 519,944.80, 779,917.20 and 319,615.60 is: 479,423.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,944.80 : 779,917.20 = 319,615.60 : x
  2. Step 2: Convert to fraction form
    519,944.80/779,917.20 = 319,615.60/x
  3. Step 3: Cross multiply
    519,944.80x = 779,917.20 × 319,615.60
  4. Step 4: Simplify right side
    519,944.80x = 249,273,703,828.32
  5. Step 5: Solve for x
    x = 249,273,703,828.32/519,944.80
  6. Step 6: Final answer
    x = 479,423.40

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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.