Home / 919,987.20-1,379,980.80-288,964.80

Finding the Fourth Proportional to 919,987.20, 1,379,980.80 and 288,964.80

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Solution

The fourth proportional to 919,987.20, 1,379,980.80 and 288,964.80 is: 433,447.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,987.20 : 1,379,980.80 = 288,964.80 : x
  2. Step 2: Convert to fraction form
    919,987.20/1,379,980.80 = 288,964.80/x
  3. Step 3: Cross multiply
    919,987.20x = 1,379,980.80 × 288,964.80
  4. Step 4: Simplify right side
    919,987.20x = 398,765,875,875.84
  5. Step 5: Solve for x
    x = 398,765,875,875.84/919,987.20
  6. Step 6: Final answer
    x = 433,447.20

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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.