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Finding the Fourth Proportional to 1,419,531.30, 1,958,982.84 and 774,978.66

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Solution

The fourth proportional to 1,419,531.30, 1,958,982.84 and 774,978.66 is: 1,069,486.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419,531.30 : 1,958,982.84 = 774,978.66 : x
  2. Step 2: Convert to fraction form
    1,419,531.30/1,958,982.84 = 774,978.66/x
  3. Step 3: Cross multiply
    1,419,531.30x = 1,958,982.84 × 774,978.66
  4. Step 4: Simplify right side
    1,419,531.30x = 1,518,169,896,306.19
  5. Step 5: Solve for x
    x = 1,518,169,896,306.19/1,419,531.30
  6. Step 6: Final answer
    x = 1,069,486.74

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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.