Home / 1,388,293.60-2,082,440.40-391,021.60

Finding the Fourth Proportional to 1,388,293.60, 2,082,440.40 and 391,021.60

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Solution

The fourth proportional to 1,388,293.60, 2,082,440.40 and 391,021.60 is: 586,532.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,293.60 : 2,082,440.40 = 391,021.60 : x
  2. Step 2: Convert to fraction form
    1,388,293.60/2,082,440.40 = 391,021.60/x
  3. Step 3: Cross multiply
    1,388,293.60x = 2,082,440.40 × 391,021.60
  4. Step 4: Simplify right side
    1,388,293.60x = 814,279,177,112.64
  5. Step 5: Solve for x
    x = 814,279,177,112.64/1,388,293.60
  6. Step 6: Final answer
    x = 586,532.40

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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.