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Finding the Fourth Proportional to 999,993.60, 1,499,990.40 and 401,047.20

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Solution

The fourth proportional to 999,993.60, 1,499,990.40 and 401,047.20 is: 601,570.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,993.60 : 1,499,990.40 = 401,047.20 : x
  2. Step 2: Convert to fraction form
    999,993.60/1,499,990.40 = 401,047.20/x
  3. Step 3: Cross multiply
    999,993.60x = 1,499,990.40 × 401,047.20
  4. Step 4: Simplify right side
    999,993.60x = 601,566,949,946.88
  5. Step 5: Solve for x
    x = 601,566,949,946.88/999,993.60
  6. Step 6: Final answer
    x = 601,570.80

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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.