Home / 1,209,015.50-1,668,441.38-665,139.65

Finding the Fourth Proportional to 1,209,015.50, 1,668,441.38 and 665,139.65

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Solution

The fourth proportional to 1,209,015.50, 1,668,441.38 and 665,139.65 is: 917,892.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,015.50 : 1,668,441.38 = 665,139.65 : x
  2. Step 2: Convert to fraction form
    1,209,015.50/1,668,441.38 = 665,139.65/x
  3. Step 3: Cross multiply
    1,209,015.50x = 1,668,441.38 × 665,139.65
  4. Step 4: Simplify right side
    1,209,015.50x = 1,109,746,515,538.72
  5. Step 5: Solve for x
    x = 1,109,746,515,538.72/1,209,015.50
  6. Step 6: Final answer
    x = 917,892.71

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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.