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Finding the Fourth Proportional to 692,578.80, 1,039,710.60 and 439,858.80

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Solution

The fourth proportional to 692,578.80, 1,039,710.60 and 439,858.80 is: 660,323.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,578.80 : 1,039,710.60 = 439,858.80 : x
  2. Step 2: Convert to fraction form
    692,578.80/1,039,710.60 = 439,858.80/x
  3. Step 3: Cross multiply
    692,578.80x = 1,039,710.60 × 439,858.80
  4. Step 4: Simplify right side
    692,578.80x = 457,325,856,863.28
  5. Step 5: Solve for x
    x = 457,325,856,863.28/692,578.80
  6. Step 6: Final answer
    x = 660,323.21

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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.