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Finding the Fourth Proportional to 1,354,914.12, 1,869,248.06 and 781,843.56

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Solution

The fourth proportional to 1,354,914.12, 1,869,248.06 and 781,843.56 is: 1,078,636.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,354,914.12 : 1,869,248.06 = 781,843.56 : x
  2. Step 2: Convert to fraction form
    1,354,914.12/1,869,248.06 = 781,843.56/x
  3. Step 3: Cross multiply
    1,354,914.12x = 1,869,248.06 × 781,843.56
  4. Step 4: Simplify right side
    1,354,914.12x = 1,461,459,557,753.49
  5. Step 5: Solve for x
    x = 1,461,459,557,753.49/1,354,914.12
  6. Step 6: Final answer
    x = 1,078,636.30

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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.