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Finding the Fourth Proportional to 1,425,642, 1,966,901.58 and 813,354.90

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Solution

The fourth proportional to 1,425,642, 1,966,901.58 and 813,354.90 is: 1,122,153.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425,642 : 1,966,901.58 = 813,354.90 : x
  2. Step 2: Convert to fraction form
    1,425,642/1,966,901.58 = 813,354.90/x
  3. Step 3: Cross multiply
    1,425,642x = 1,966,901.58 × 813,354.90
  4. Step 4: Simplify right side
    1,425,642x = 1,599,789,037,910.74
  5. Step 5: Solve for x
    x = 1,599,789,037,910.74/1,425,642
  6. Step 6: Final answer
    x = 1,122,153.41

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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.