Home / 919,630.80-1,379,489.40-288,565.20

Finding the Fourth Proportional to 919,630.80, 1,379,489.40 and 288,565.20

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Solution

The fourth proportional to 919,630.80, 1,379,489.40 and 288,565.20 is: 432,861.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,630.80 : 1,379,489.40 = 288,565.20 : x
  2. Step 2: Convert to fraction form
    919,630.80/1,379,489.40 = 288,565.20/x
  3. Step 3: Cross multiply
    919,630.80x = 1,379,489.40 × 288,565.20
  4. Step 4: Simplify right side
    919,630.80x = 398,072,634,608.88
  5. Step 5: Solve for x
    x = 398,072,634,608.88/919,630.80
  6. Step 6: Final answer
    x = 432,861.36

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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.