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Finding the Fourth Proportional to 1,278,158.76, 1,917,881.82 and 851,982.12

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Solution

The fourth proportional to 1,278,158.76, 1,917,881.82 and 851,982.12 is: 1,278,402.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,158.76 : 1,917,881.82 = 851,982.12 : x
  2. Step 2: Convert to fraction form
    1,278,158.76/1,917,881.82 = 851,982.12/x
  3. Step 3: Cross multiply
    1,278,158.76x = 1,917,881.82 × 851,982.12
  4. Step 4: Simplify right side
    1,278,158.76x = 1,634,001,018,913.06
  5. Step 5: Solve for x
    x = 1,634,001,018,913.06/1,278,158.76
  6. Step 6: Final answer
    x = 1,278,402.24

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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.