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Finding the Fourth Proportional to 3,145,842, 4,718,780.28 and 781,938

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Solution

The fourth proportional to 3,145,842, 4,718,780.28 and 781,938 is: 1,172,911.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145,842 : 4,718,780.28 = 781,938 : x
  2. Step 2: Convert to fraction form
    3,145,842/4,718,780.28 = 781,938/x
  3. Step 3: Cross multiply
    3,145,842x = 4,718,780.28 × 781,938
  4. Step 4: Simplify right side
    3,145,842x = 3,689,793,614,582.64
  5. Step 5: Solve for x
    x = 3,689,793,614,582.64/3,145,842
  6. Step 6: Final answer
    x = 1,172,911.30

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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.