Home / 1,287,631.40-1,931,447.10-808,629.80

Finding the Fourth Proportional to 1,287,631.40, 1,931,447.10 and 808,629.80

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Solution

The fourth proportional to 1,287,631.40, 1,931,447.10 and 808,629.80 is: 1,212,944.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,631.40 : 1,931,447.10 = 808,629.80 : x
  2. Step 2: Convert to fraction form
    1,287,631.40/1,931,447.10 = 808,629.80/x
  3. Step 3: Cross multiply
    1,287,631.40x = 1,931,447.10 × 808,629.80
  4. Step 4: Simplify right side
    1,287,631.40x = 1,561,825,682,183.58
  5. Step 5: Solve for x
    x = 1,561,825,682,183.58/1,287,631.40
  6. Step 6: Final answer
    x = 1,212,944.70

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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.