Home / 1,209,385.98-1,668,910.80-665,470.88

Finding the Fourth Proportional to 1,209,385.98, 1,668,910.80 and 665,470.88

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Solution

The fourth proportional to 1,209,385.98, 1,668,910.80 and 665,470.88 is: 918,326.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,385.98 : 1,668,910.80 = 665,470.88 : x
  2. Step 2: Convert to fraction form
    1,209,385.98/1,668,910.80 = 665,470.88/x
  3. Step 3: Cross multiply
    1,209,385.98x = 1,668,910.80 × 665,470.88
  4. Step 4: Simplify right side
    1,209,385.98x = 1,110,611,538,717.50
  5. Step 5: Solve for x
    x = 1,110,611,538,717.50/1,209,385.98
  6. Step 6: Final answer
    x = 918,326.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.