Home / 1,189,889.79-1,785,543.86-431,790.40

Finding the Fourth Proportional to 1,189,889.79, 1,785,543.86 and 431,790.40

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Solution

The fourth proportional to 1,189,889.79, 1,785,543.86 and 431,790.40 is: 647,942.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,889.79 : 1,785,543.86 = 431,790.40 : x
  2. Step 2: Convert to fraction form
    1,189,889.79/1,785,543.86 = 431,790.40/x
  3. Step 3: Cross multiply
    1,189,889.79x = 1,785,543.86 × 431,790.40
  4. Step 4: Simplify right side
    1,189,889.79x = 770,980,697,526.94
  5. Step 5: Solve for x
    x = 770,980,697,526.94/1,189,889.79
  6. Step 6: Final answer
    x = 647,942.95

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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.