Home / 1,289,785.42-1,779,977.51-716,861.89

Finding the Fourth Proportional to 1,289,785.42, 1,779,977.51 and 716,861.89

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Solution

The fourth proportional to 1,289,785.42, 1,779,977.51 and 716,861.89 is: 989,310.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,785.42 : 1,779,977.51 = 716,861.89 : x
  2. Step 2: Convert to fraction form
    1,289,785.42/1,779,977.51 = 716,861.89/x
  3. Step 3: Cross multiply
    1,289,785.42x = 1,779,977.51 × 716,861.89
  4. Step 4: Simplify right side
    1,289,785.42x = 1,275,998,041,976.09
  5. Step 5: Solve for x
    x = 1,275,998,041,976.09/1,289,785.42
  6. Step 6: Final answer
    x = 989,310.33

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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.