Home / 391,104,661.20-586,656,991.80-209,706,133.20

Finding the Fourth Proportional to 391,104,661.20, 586,656,991.80 and 209,706,133.20

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Solution

The fourth proportional to 391,104,661.20, 586,656,991.80 and 209,706,133.20 is: 314,559,199.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,104,661.20 : 586,656,991.80 = 209,706,133.20 : x
  2. Step 2: Convert to fraction form
    391,104,661.20/586,656,991.80 = 209,706,133.20/x
  3. Step 3: Cross multiply
    391,104,661.20x = 586,656,991.80 × 209,706,133.20
  4. Step 4: Simplify right side
    391,104,661.20x = 123,025,569,265,122,096
  5. Step 5: Solve for x
    x = 123,025,569,265,122,096/391,104,661.20
  6. Step 6: Final answer
    x = 314,559,199.80

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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.