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Finding the Fourth Proportional to 980,937.60, 1,471,406.40 and 420,028.80

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Solution

The fourth proportional to 980,937.60, 1,471,406.40 and 420,028.80 is: 630,043.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    980,937.60 : 1,471,406.40 = 420,028.80 : x
  2. Step 2: Convert to fraction form
    980,937.60/1,471,406.40 = 420,028.80/x
  3. Step 3: Cross multiply
    980,937.60x = 1,471,406.40 × 420,028.80
  4. Step 4: Simplify right side
    980,937.60x = 618,033,064,504.32
  5. Step 5: Solve for x
    x = 618,033,064,504.32/980,937.60
  6. Step 6: Final answer
    x = 630,043.20

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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.