Home / 1,388,661.40-2,082,992.10-391,389.40

Finding the Fourth Proportional to 1,388,661.40, 2,082,992.10 and 391,389.40

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Solution

The fourth proportional to 1,388,661.40, 2,082,992.10 and 391,389.40 is: 587,084.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,661.40 : 2,082,992.10 = 391,389.40 : x
  2. Step 2: Convert to fraction form
    1,388,661.40/2,082,992.10 = 391,389.40/x
  3. Step 3: Cross multiply
    1,388,661.40x = 2,082,992.10 × 391,389.40
  4. Step 4: Simplify right side
    1,388,661.40x = 815,261,028,223.74
  5. Step 5: Solve for x
    x = 815,261,028,223.74/1,388,661.40
  6. Step 6: Final answer
    x = 587,084.10

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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.