Home / 1,391,209.21-2,087,011.96-431,747.71

Finding the Fourth Proportional to 1,391,209.21, 2,087,011.96 and 431,747.71

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Solution

The fourth proportional to 1,391,209.21, 2,087,011.96 and 431,747.71 is: 647,683.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,209.21 : 2,087,011.96 = 431,747.71 : x
  2. Step 2: Convert to fraction form
    1,391,209.21/2,087,011.96 = 431,747.71/x
  3. Step 3: Cross multiply
    1,391,209.21x = 2,087,011.96 × 431,747.71
  4. Step 4: Simplify right side
    1,391,209.21x = 901,062,634,472.61
  5. Step 5: Solve for x
    x = 901,062,634,472.61/1,391,209.21
  6. Step 6: Final answer
    x = 647,683.06

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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.