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Finding the Fourth Proportional to 3,982,521.64, 5,973,769.98 and 990,705.64

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Solution

The fourth proportional to 3,982,521.64, 5,973,769.98 and 990,705.64 is: 1,486,055.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,982,521.64 : 5,973,769.98 = 990,705.64 : x
  2. Step 2: Convert to fraction form
    3,982,521.64/5,973,769.98 = 990,705.64/x
  3. Step 3: Cross multiply
    3,982,521.64x = 5,973,769.98 × 990,705.64
  4. Step 4: Simplify right side
    3,982,521.64x = 5,918,247,611,248.69
  5. Step 5: Solve for x
    x = 5,918,247,611,248.69/3,982,521.64
  6. Step 6: Final answer
    x = 1,486,055.36

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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.