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Finding the Fourth Proportional to 605,422.40, 907,485.60 and 205,692.80

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Solution

The fourth proportional to 605,422.40, 907,485.60 and 205,692.80 is: 308,319.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,422.40 : 907,485.60 = 205,692.80 : x
  2. Step 2: Convert to fraction form
    605,422.40/907,485.60 = 205,692.80/x
  3. Step 3: Cross multiply
    605,422.40x = 907,485.60 × 205,692.80
  4. Step 4: Simplify right side
    605,422.40x = 186,663,254,023.68
  5. Step 5: Solve for x
    x = 186,663,254,023.68/605,422.40
  6. Step 6: Final answer
    x = 308,319.04

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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.