Home / 1,431,147.12-1,974,899.46-786,567.78

Finding the Fourth Proportional to 1,431,147.12, 1,974,899.46 and 786,567.78

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Solution

The fourth proportional to 1,431,147.12, 1,974,899.46 and 786,567.78 is: 1,085,417.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431,147.12 : 1,974,899.46 = 786,567.78 : x
  2. Step 2: Convert to fraction form
    1,431,147.12/1,974,899.46 = 786,567.78/x
  3. Step 3: Cross multiply
    1,431,147.12x = 1,974,899.46 × 786,567.78
  4. Step 4: Simplify right side
    1,431,147.12x = 1,553,392,283,975.40
  5. Step 5: Solve for x
    x = 1,553,392,283,975.40/1,431,147.12
  6. Step 6: Final answer
    x = 1,085,417.61

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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.