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Finding the Fourth Proportional to 279,778,870.80, 419,668,306.20 and 177,994,141.20

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Solution

The fourth proportional to 279,778,870.80, 419,668,306.20 and 177,994,141.20 is: 266,991,211.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,778,870.80 : 419,668,306.20 = 177,994,141.20 : x
  2. Step 2: Convert to fraction form
    279,778,870.80/419,668,306.20 = 177,994,141.20/x
  3. Step 3: Cross multiply
    279,778,870.80x = 419,668,306.20 × 177,994,141.20
  4. Step 4: Simplify right side
    279,778,870.80x = 74,698,499,750,927,632
  5. Step 5: Solve for x
    x = 74,698,499,750,927,632/279,778,870.80
  6. Step 6: Final answer
    x = 266,991,211.80

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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.