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Finding the Fourth Proportional to 1,340,734.57, 1,850,250.22 and 728,928.50

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Solution

The fourth proportional to 1,340,734.57, 1,850,250.22 and 728,928.50 is: 1,005,941.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340,734.57 : 1,850,250.22 = 728,928.50 : x
  2. Step 2: Convert to fraction form
    1,340,734.57/1,850,250.22 = 728,928.50/x
  3. Step 3: Cross multiply
    1,340,734.57x = 1,850,250.22 × 728,928.50
  4. Step 4: Simplify right side
    1,340,734.57x = 1,348,700,106,415.70
  5. Step 5: Solve for x
    x = 1,348,700,106,415.70/1,340,734.57
  6. Step 6: Final answer
    x = 1,005,941.18

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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.