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Finding the Fourth Proportional to 986,012.80, 1,479,019.20 and 947,305.60

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Solution

The fourth proportional to 986,012.80, 1,479,019.20 and 947,305.60 is: 1,420,958.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,012.80 : 1,479,019.20 = 947,305.60 : x
  2. Step 2: Convert to fraction form
    986,012.80/1,479,019.20 = 947,305.60/x
  3. Step 3: Cross multiply
    986,012.80x = 1,479,019.20 × 947,305.60
  4. Step 4: Simplify right side
    986,012.80x = 1,401,083,170,667.52
  5. Step 5: Solve for x
    x = 1,401,083,170,667.52/986,012.80
  6. Step 6: Final answer
    x = 1,420,958.40

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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.